[Upgrading, Modifying and Unlocking] jurisquo:
Many thanks for catching my error. I re-did all the steps (including bootloader unlock), and flashed magisk patched boot.img, but still no root. Magisk says Ramdisk -yes.

Would you mind looking at new getvar below and let me know what I missed. As always, very appreciative of the help I have received over the years on XDA.

C:\Program Files\Minimal ADB and Fastboot>fastboot getvar all

(bootloader) version: 0.5

(bootloader) version-bootloader: MBM-2.1-channel_t-16222030b3b-210129

(bootloader) product: channel

(bootloader) board: channel

(bootloader) secure: yes

(bootloader) hwrev: PVT

(bootloader) radio: 4

(bootloader) storage-type: emmc

(bootloader) emmc: 32GB SAMSUNG QD63MB RV=08 PV=01 FV=0000000000000001

(bootloader) ram: 2GB SAMSUNG LP3 DIE=8Gb M5=01 M6=06 M7=00 M8=1F

(bootloader) cpu: SDM632

(bootloader) serialno: ZY326NR4LC

(bootloader) cid: 0x0015

(bootloader) channelid: 0x8e

(bootloader) uid: 9F26B53700000000000000000000

(bootloader) securestate: flashing_unlocked

(bootloader) factory-modes: disabled

(bootloader) iswarrantyvoid: yes

(bootloader) max-download-size: 536870912

(bootloader) reason: Volume down key pressed

(bootloader) imei: XXXXXXXXXXXXXXXXXX

(bootloader) imei2:

(bootloader) meid:

(bootloader) date: 10-22-2019

(bootloader) sku: XT1952-6

(bootloader) carrier_sku: XT1952-6

(bootloader) battid: SB18C30735

(bootloader) iccid:

(bootloader) cust_md5:

(bootloader) max-sparse-size: 268435456

(bootloader) current-time: "Fri Nov 26 17:15:50 UTC 2021"

(bootloader) ro.build.fingerprint[0]: motorola/channel_t/channel:10/QPYS

(bootloader) ro.build.fingerprint[1]: 30.85-18-9-5/48178:user/release-ke

(bootloader) ro.build.fingerprint[2]: ys

(bootloader) poweroffalarm: 0

(bootloader) ro.build.version.full: <not found>

(bootloader) ro.build.version.qcom: LA.UM.8.6.2.r1-06600-89xx.0

(bootloader) version-baseband: M632_43.192.01.165R CHANNEL_NA_TMO_CUST

(bootloader) kernel.version[0]: Linux version 4.9.206-perf+ (nobody@andr

(bootloader) kernel.version[1]: oid-build) (gcc version 4.9.x 20150123 (

(bootloader) kernel.version[2]: prerelease) (GCC) ) #1 SMP PREEMPT Fri J

(bootloader) kernel.version[3]: an 29 04:53:34 CST 2021

(bootloader) sbl1.git: MBM-2.1-channel_t-a30e356d6d-210129

(bootloader) rpm.git: MBM-2.1-channel_t-20f2cf34-210129

(bootloader) tz.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) devcfg.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) keymaster.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) cmnlib.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) cmnlib64.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) prov.git: MBM-2.1-channel_t-32abdc9822-210129

(bootloader) aboot.git: MBM-2.1-channel_t-16222030b3b-210129

(bootloader) frp-state: no protection (77)

(bootloader) ro.carrier: metropcs

(bootloader) current-slot: b

(bootloader) running-boot-lun: 0

(bootloader) running-slot: _b

(bootloader) slot-suffixes: _a,_b

(bootloader) slot-count: 2

(bootloader) slot-successful:_a: Yes

(bootloader) slot-successful:_b: Yes

(bootloader) slot-bootable:_a: Yes

(bootloader) slot-bootable:_b: Yes

(bootloader) slot-retry-count:_a: 6

(bootloader) slot-retry-count:_b: 6

(bootloader) pcb-part-no: SP69A6P49P

all: listed above

finished. total time: 0.201s