user since last Christmas I wanted to give feedback to share the difficulties, successes and some tips.
Especially if I'm wrong, don't hesitate to correct me the goal being to give reliable information to make life easier
GPS: I learned that with waydroid active the gps does not work.
solution to test it quickly:
https://forums.ubports.com/topic/7047/gps-not-working-on-redmi-note-9s/17
Waydroid: works well, be careful on this smartphone do not install it with waydroid-helper but directly (in OTA-20 perhaps in OTA-21 there's no problem, I don't test).
Bluetooth: works well except for phone calls (music videos browser youtube ok).
Dekko2: email attachments not accessible
Axolotl: too much bug to use it (duplicate messages in groups, capricious synchronization on my phone,) I use Signal with Waydroid without problem.
for the rest, smooth browser, battery life slightly less good than under android (especially if several android apps open I have the impression that there is a battery leak). Otherwise 24h without problem in heavy use.
With some sacrifices (missing some native apps) my daily use is for the moment assured in a pleasant way.
Edit : for installation there are some error, the easiest way is to have the last android 10 official MUI firmware on the phone before use ubports installer. Then everything work fine.