how can I downgrade back to Android11

[suuu]

My phone is note20 u. since I upgraded to Android12, lots of Apps I can't use. I want to downgrade back to Android11, but I don't know how to do it...

[suuu]

oh， I see, thank you! they are Chinese apps, just because one of them is my bank app, I can't open it, it makes some trouble with me.

[user751201tmO21 · Accepted solution]

officially, you can't.

name two apps that don't work now. if they don't work, contact the author, obviously they are not made for A12