[Android Apps and Games] osm0sis:
/dev/block/by-name
/dev/block/bootdevice/by-name
/dev/block/platform/*/*/by-name
/dev/block/platform/*/by-name

Probably Qualcomm or whoever defined these at some point, especially the old platform ones, then the bootdevice and direct by-name one were created by Google, Qualcomm or someone to simplify accessing them on newer devices.

On my 8T /vendor/etc/fstab.qcom contains:

system /system ext4 ro,barrier=1,discard wait,slotselect,avb=vbmeta_system,logical,first_stage_mount,avb_keys=/avb/q-gsi.avbpubkey:/avb/r-gsi.avbpubkey:/avb/s-gsi.avbpubkey
system_ext /system_ext ext4 ro,barrier=1,discard wait,slotselect,avb=vbmeta_system,logical,first_stage_mount
product /product ext4 ro,barrier=1,discard wait,slotselect,avb=vbmeta_system,logical,first_stage_mount
vendor /vendor ext4 ro,barrier=1,discard wait,slotselect,avb,logical,first_stage_mount
odm /odm ext4 ro,barrier=1,discard wait,slotselect,avb,logical,first_stage_mount
/dev/block/by-name/metadata /metadata ext4 noatime,nosuid,nodev,discard,sync wait,check,formattable,first_stage_mount
/dev/block/bootdevice/by-name/op2 /mnt/vendor/op2 ext4 noatime,nosuid,nodev,barrier=1,data=ordered wait,check
/dev/block/bootdevice/by-name/userdata /data f2fs noatime,nosuid,nodev,discard,reserve_root=32768,resgid=1065,fsync_mode=nobarrier,inlinecrypt latemount,wait,check,formattable,fileencryption=aes-256-xts:aes-256-cts:v2+inlinecrypt_optimized+wrappedkey_v0,metadata_encryption=aes-256-xts:wrappedkey_v0,keydirectory=/metadata/vold/metadata_encryption,quota,reservedsize=512M,sysfs_path=/sys/devices/platform/soc/1d84000.ufshc,checkpoint=fs
/dev/block/bootdevice/by-name/persist /mnt/vendor/persist ext4 noatime,nosuid,nodev,barrier=1 wait
/dev/block/bootdevice/by-name/misc /misc emmc defaults defaults
#/devices/platform/soc/8804000.sdhci/mmc_host* /storage/sdcard1 vfat nosuid,nodev wait,voldmanaged=sdcard1:auto,encryptable=footer
#/devices/platform/soc/1da4000.ufshc_card/host* /storage/sdcard1 vfat nosuid,nodev wait,voldmanaged=sdcard1:auto,encryptable=footer
/devices/platform/soc/*.ssusb/*.dwc3/xhci-hcd.*.auto* /storage/usbotg vfat nosuid,nodev wait,voldmanaged=usbotg:auto
#/dev/block/bootdevice/by-name/spunvm /mnt/vendor/spunvm vfat rw,noatime,shortname=lower,uid=1000,gid=1000,dmask=007,fmask=007,context=u:object_r:vendor_spunvm_file:s0 wait
/dev/block/bootdevice/by-name/modem /vendor/firmware_mnt vfat ro,shortname=lower,uid=1000,gid=1000,dmask=227,fmask=337,context=u:object_r:firmware_file:s0 wait,slotselect
/dev/block/bootdevice/by-name/dsp /vendor/dsp ext4 ro,nosuid,nodev,barrier=1 wait,slotselect
/dev/block/bootdevice/by-name/bluetooth /vendor/bt_firmware vfat ro,shortname=lower,uid=1002,gid=3002,dmask=227,fmask=337,context=u:object_r:bt_firmware_file:s0 wait,slotselect

But the fstab is only for things with somewhat defined mount points I guess?

:/ # ls /dev/block/by-name
ALIGN_TO_128K_1 keymaster_a qupfw_a
ALIGN_TO_128K_2 keymaster_b qupfw_b
ALIGN_TO_512K keystore rawdump
abl_a limits recovery_a
abl_b limits-cdsp recovery_b
abl_log logdump reserve1
aging_kernel logfs reserve2
aging_mod logo_a reserve3
android_log logo_b reserve4
aop_a mdm1m9kefs1 sda
aop_b mdm1m9kefs2 sdb
apdp mdm1m9kefs3 sdc
bluetooth_a mdm1m9kefsc sdd
bluetooth_b mdm1oemnvbktmp sde
boot_a mdm_oem_dycnvbk sdf
boot_b mdm_oem_stanvbk secdata
carrier mdmddr spunvm
cdt mdtp_a ssd
cmnlib64_a mdtp_b storsec_a
cmnlib64_b mdtpsecapp_a storsec_b
cmnlib_a mdtpsecapp_b super
cmnlib_b metadata tz_a
config misc tz_b
ddr modem_a uefisecapp_a
devcfg_a modem_b uefisecapp_b
devcfg_b modemdump uefivarstore
devinfo modemst1 userdata
dip modemst2 vbmeta_a
dsp_a msadp vbmeta_b
dsp_b multiimgoem_a vbmeta_system_a
dtbo_a multiimgoem_b vbmeta_system_b
dtbo_b multiimgqti_a vm-data
featenabler_a multiimgqti_b vm-keystore
featenabler_b oem_cust1_a vm-linux_a
frp oem_cust1_b vm-linux_b
fsc oem_cust2_a vm-system_a
fsg oem_cust2_b vm-system_b
hyp_a op1 xbl_a
hyp_b op2 xbl_b
hyp_log param xbl_config_a
imagefv_a persist xbl_config_b
imagefv_b persist_bkp
kernel_log qsee_log
:/ #