I think you are not supposed to play with system apps on xiaomi.eu ROM.
https://xiaomi.eu/community/threads/22-10-19.67157/post-673912
For stock rom go here : https://new.c.mi.com/global/miuidownload/detail/guide/1
Latest from https://xdaforums.com/t/module-play-integrity-fix-safetynet-fix.4607985/page-72 passes device and basic integrity again. For a while ...
EDIT: oh hi chiteroman Thanks !
Easiest way to try would be root and https://github.com/chiteroman/PlayIntegrityFix . I'm using IceBox to freeze hidden/renamed Magisk when using banking apps. No guarantee thats works. Other option is to lock bootloader and install stock ROM. Still no guarantee
Go to xdaforums and use search. There is one user who have site admins approved service for Xiaomi authorized flash.
If i needed unbrick i surely would contact him.