[Magisk] Andy3153:
So, while LineageOS was still on version 19, I was using Magisk and installing it on and off when I felt the need to since it was getting wiped by OTA updates (and I didn't see that guide yet) and I just didn't bother enough to install it every time. Before I updated to version 20, Magisk was still wiped from some other previous OTA, but updating to version 20 required manual intervention. So, after doing the LOS upgrade, I decided I should finally install Magisk again since I was tinkering with my phone anyways to do that update and I could give the Magisk OTA guide a shot whenever another OTA would hit.

I successfully followed the installation instructions for Magisk and I was able to install it, but the Magisk app can't see it:

View attachment 5832251

How do I know it's likely installed properly? Fox's Magisk Module Manager was able to install my modules well, and while just playing around in the ADB shell I was able to see signs of Magisk on the system:

OnePlus6:/ # ls -l /bin/su

lrwxrwxrwx 1 root root 8 1971-05-02 11:28 /bin/su -> ./magisk

(`su` is present in $PATH, and it is a symbolic link to a binary called `magisk`)

OnePlus6:/ # mount | grep -i magisk

devpts on /dev/73uMu/.magisk/pts type devpts (rw,seclabel,nosuid,noexec,relatime,mode=600,ptmxmode=000)
/dev/73uMu/.magisk/block/vendor on /dev/73uMu/.magisk/mirror/vendor type ext4 (ro,seclabel,relatime,discard)
/dev/73uMu/.magisk/block/data on /dev/73uMu/.magisk/mirror/data type ext4 (rw,seclabel,relatime,discard,noauto_da_alloc,resgid=1065,errors=remount-ro,data=ordered)
/dev/73uMu/.magisk/block/system_root on /dev/73uMu/.magisk/mirror/system_root type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/data on /dev/73uMu/.magisk/modules type ext4 (rw,seclabel,relatime,discard,noauto_da_alloc,resgid=1065,errors=remount-ro,data=ordered)
/dev/73uMu/.magisk/block/system_root on /system/bin/abb type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/abx type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/abx2xml type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/am type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/apexd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/app_process32 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/app_process64 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/appops type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/appwidget type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/arping type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/atrace type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/audioserver type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/auditctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/awk type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/backuptool_ab.functions type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/backuptool_ab.sh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/backuptool_postinstall.sh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/badblocks type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bcc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/blank_screen type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/blkid type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bmgr type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bootanimation type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bootctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bootstat type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bootstrap type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/boringssl_self_test32 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/boringssl_self_test64 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bpfloader type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/btfloader type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bu type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bugreport type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bugreportz type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/bzip2 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/cameraserver type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/charger type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/cmd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/content type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/credstore type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/curl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/debuggerd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/device_config type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dmabuf_dump type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dmctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dmesgd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dmuserd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dnsmasq type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dpm type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/drmserver type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dump.erofs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dumpstate type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/dumpsys type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/e2freefrag type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/e2fsck type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/e2fsdroid type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/extra_free_kbytes.sh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/flags_health_check type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsck.erofs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsck.exfat type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsck.f2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsck.ntfs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsck_msdos type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/fsverity_init type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/gatekeeperd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/getcap type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/gpuservice type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/gsi_tool type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/gsid type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/heapprofd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/hid type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/hw type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/hwservicemanager type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/idlcli type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/idmap2 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/idmap2d type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ime type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/incident type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/incident-helper-cmd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/incident_helper type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/incidentd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/init type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/input type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/installd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/iotop type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ip type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ip-up-vpn type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/iperf3 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/iptables type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/iw type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/keystore2 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/keystore_cli_v2 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ld.mc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ldd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/librank type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/llkd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/lmkd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/lockagent_crasher type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/locksettings type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/logcat type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/logcatd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/logd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/logpersist.start type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/logwrapper type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/lpdump type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/lpdumpd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/lshal type ext4 (ro,seclabel,relatime,errors=remount-ro)
tmpfs on /system/bin/magisk type tmpfs (rw,seclabel,relatime,size=2867816k,nr_inodes=716954,mode=755)
tmpfs on /system/bin/magiskpolicy type tmpfs (rw,seclabel,relatime,size=2867816k,nr_inodes=716954,mode=755)
/dev/73uMu/.magisk/block/system_root on /system/bin/make_f2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mdnsd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mediaextractor type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mediametrics type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mediaserver type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/migrate_legacy_obb_data.sh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mini-keyctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mke2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mkfs.erofs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mkfs.exfat type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mkfs.ntfs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mm_events type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/monkey type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mount.ntfs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/mtpd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ndc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/netd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/netutils-wrapper-1.0 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/newfs_msdos type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/odsign type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/otapreopt type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/otapreopt_chroot type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/otapreopt_script type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/otapreopt_slot type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/perfetto type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ping type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ping6 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/pm type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/pppd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/prng_seeder type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/procmem type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/procrank type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/profcollectctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/profcollectd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/racoon type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/reboot type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/recovery-persist type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/recovery-refresh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/remount type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/requestsync type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/resize2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/rss_hwm_reset type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/run-as type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sanitizer-status type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/schedtest type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/screencap type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/screenrecord type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sdcard type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/secdiscard type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/secilc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sensorservice type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/service type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/servicedispatcher type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/servicemanager type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/set-verity-state type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/setcap type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/settaskprofile type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/settings type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sgdisk type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sh type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/showmap type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/simpleperf type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/simpleperf_app_runner type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sload_f2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sm type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/snapshotctl type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/snapuserd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/sqlite3 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ss type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/start_with_lockagent type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/storaged type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/strace type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/surfaceflinger type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/svc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tcpdump type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/telecom type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tinymix type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tombstoned type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/toolbox type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/toybox type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/traced type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/traced_perf type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/traced_probes type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tracepath type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tracepath6 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/traceroute6 type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/trigger_perfetto type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tune2fs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/tzdatacheck type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/uiautomator type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/uinput type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/uncrypt type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/unwind_info type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/unwind_reg_info type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/unwind_symbols type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/update_engine type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/update_engine_client type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/update_verifier type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/usbd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/vdc type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/viewcompiler type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/vold type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/vold_prepare_subdirs type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/vr type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/watchdogd type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/wificond type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/wm type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/xml2abx type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/system_root on /system/bin/ziptool type ext4 (ro,seclabel,relatime,errors=remount-ro)
/dev/73uMu/.magisk/block/data on /system/etc/hosts type ext4 (rw,seclabel,relatime,discard,noauto_da_alloc,resgid=1065,errors=remount-ro,data=ordered)
tmpfs on /dev/73uMu/.magisk/mirror/system_root/system/bin/app_process32 type tmpfs (rw,seclabel,relatime,size=2867816k,nr_inodes=716954,mode=755)
tmpfs on /dev/73uMu/.magisk/mirror/system_root/system/bin/app_process64 type tmpfs (rw,seclabel,relatime,size=2867816k,nr_inodes=716954,mode=755)

(there seem to be many mounts that get pointed to paths that contain `magisk` in their path)

My methods of determining whether Magisk was actually installed properly might as well be completely flawed, but it's just what I found while, after re-trying the installation twice and giving up, playing around in an ADB root shell and looking at random things. I was quite literally just messing around, looking at things I would look at in a normal Linux computer, and I was able to find the two code snippets I sent. But the fact that the module manager still worked might be proof it actually works.

What's wrong here?