Hello,
As title said, I have a Lenovo Tab M10 HD with 3 GB RAM with Android 11 stock firmware.
Briefly, I did these steps to install Ubuntu Touch:
- 
About/Build number : click many times and confirm with password 
- 
System/Developer options : activate OEM unlocking (WiFi on) and USB debugging 
- 
From Ubuntu 22.04 (terminal): 
 adb devices
 adb reboot bootloader
 fastboot flashing unlock
 fastboot reboot
- 
UBports 0.9.7 from Ubuntu Software 
 During install process : check for wiping user data (required)
- 
Under Ubuntu Touch, added UT Tweak app to increase font. 
All apps seems to work flawlessly (both cameras, sound, microphone, ...) except that sleep mode is rarely working (tried 30 s, 1 min, 2 min). I need to press the power button.
Otherwise great OS !