Hi, I have the same issue as the OP, however UBPorts Recovery is working fine. Always boots to that.
If I run: fastboot oem device-info
(bootloader) Verity mode: true
(bootloader) Device unlocked: true
(bootloader) Device critical unlocked: true
(bootloader) Charger screen enabled: false
adb runs fine when in Recovery. I can see the "disk" and top works showing all the processes.
Not sure how to proceed. Tried 0.9.1 and 0.8.9 both Linux and Windows. Same result.
Any help most welcome. Thanks in advance.
Firstly, OP is a guide, there is no issue. You need to wait further after the installer says it is completed. Your phone migh be updated.
And clearly state your query.
If your phone is stuck at boot (bootloop), try this. Clean installation
Install twrp / orangefox-recovery
wipe everything except system, otg, microsd
install android-10 miui (your stock OS)
enable adb, trust computer
now use the ubports installer, v0.8.9 from my instructions.