Use stock ROM with no root, etc, and you would have no problem with Play Integrity (and banking apps). Once you unlock BL, install custom ROM (Xiaomi.eu is custom, not stock ROM), decrypt the Data and who knows what - there is nothing to blane Google but the user who did that
I mean, I also have Xiaomi.eu custom ROM, I have Magisk (mainly bcs things like Viper4Android, Screen2Auto over AndroidAuto, Secure unlock on the home and car BT and WiFi, etc), debloated phone, PIF nodule etc - but I don't blame Google, I know that it was my act and now my responsibility to do and apply all tricks necessary to pass Play Integrity and generally to hide 'root' from banking apps
One day when it wouldn't be possible anymore or I would not have time or will to read forums, to care about all new things I have to do/change to keep track with this cat and mice game, I would return to the stock ROM. No fear for now - being in the game for six or so years on various phones, ROMs, etc, still not tired about
And on the other side I would NEVER (anymore - I did on one phone in the past) decrypt Data (and storage) on my phones. For my own safety and the safety of my documents, photos, etc that I carry around with my phone