You probably won't even be able to unlock the bootloader = no installing alternative ROMs.
1, Some apps that require security are not working (Google Pay, Revolut, some banking and government apps, McDonald's, etc.)
2...
You can try this:
What you'll need: Shizuku set up and working Canta debloating app
Open shizuku and set it up, the give canta access to shizuku permissions.
Open canta and set it up
Go to the deleted apps page, the one on the right, and if you are lucky you should see the phone and contacts...
Sure. If the bootloader is not locked, you can try (install) different versions. If one suits you, you will lock the bootloader.
You won't see any difference between Global and EEA. You can try Taiwan or Russian ROM for call recording.
No. You must not try to lock the bootloader on a custom ROM! (you will destroy the device)
This is not possible in the current situation.
Here is the answer: https://xiaomi.eu/community/threads/installing-magisk-and-play-integrity-fix.70553/post-748464
Here is the answer...
try installing the modem from the first post:
Garnet_modem_A15_OS2.0.11.0VNRMIXM
However, if this happens repeatedly in several versions of the OS, a factory reset would be a good option.(However, do not restore the "settings" item from a backup.)
use the search function before you start typing
https://xiaomi.eu/community/threads/regarding-google-play-integrity-google-pay-wallet.75761/post-748452