JiaiJ thank you for your answer.
1) I know its old phone but if you will go to the stable miui 14 releases the poco x3 pro is the most popular downloaded rom from all the phone roms list. I don;'t understand leaving the project because official maintaine servise leaved it too, or because its 2 years old. What now then i have to buy new phone? Anyway its all about play integrity that don;t allow pay me by NFC on rooted phone that pesses me off like hell. I just hoped for relasing bug fixes in new version of MIUI that i asume should be well knowed on such popular phone. Or there is alternative, like ex. to install Hyper os on this phone?
2) Well im trying all the time clearing all data of the 4 google apps and uninstall updates every time for a many times under airplane mode that suddenly now lead to nowhere. I can do exactly this way like they described in your link and loose half houer on restarts and updates all the thinks and have no guaranty it will be work. People just realeases new Play integrity fixs, or Xiaomi.eu.modules without a word how to install it to make it work, and do i have again reset my google apps all the time for a unknown number of times or its should work straigt away? None information just pure link of new release. From my perpective i have like 20% chance that next PIF fix will work. I asume that people will not releasing a things with have 20% efectiveness. OR i have just the wrong phone?
Please tell what phone i have to buy to have a root and NFC payment. It's looks like came hard times for people who want keep your phones in a free way, and maintain some independece in use.