Good rom, almost all good although I found 3 bugs in my poco m3 that I hope can be solved in the future, thank you very much:
1) bluetooth headphones do not play audio: when searching for headphones are connected without problem, but when playing content or disconnected or do not hear anything, this problem is present in android 11 including xiaomi.eu 12.5 beta
2) Distortion in speaker in audios: this problem occurs in telegram audios, whatsapp, and some games, in miui roms this does not exist.
3) App rappi: in the rappipay section, a message comes out when trying to enter saying that the phone does not meet the requirements to run this section, in miui also does not happen.
I guess that points 2 and 3, are because it is a unified rom, in point two uses some incorrect codec to be stereo sound, and point 3 by using a different device identifier is not in your list of compatible devices.
From there on out all good, excellent work.