A few posts back...Hi,
My OnePlus 7T got recently the Android 12 update (OxygenOS 12.1 version HD1903_11_F.20) and I took the change to update Universal SafetyNet Fix to version 2.4.0 (from version 2.3.1).
The SafetyNet Fix-update was a BIG MISTAKE!
Now the fingerprint unlock does not work anymore. :-(
I tried all the suggestions (clearing data and hiding of Google apps/services, reboot, installed old version of SafetyNet Fix, ...) but nothing helped so far.
Only disabling SafetyNet Fix brings back the fingerprint function...
...but then it breaks the Microsoft Authenticator and Outlook!
Any further ideas? Maybe a complete list Google Apps/Services (incl. system one) would help...
https://forum.xda-developers.com/t/magisk-module-universal-safetynet-fix-2-4-0.4217823/post-88335083