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 !