From https://xdaforums.com/t/module-play-integrity-fix-safetynet-fix.4607985/ :
BEFORE YOU START:
- Your ROM must be signed with a private key from maintainer, you can check with this command:
unzip -l /system/etc/security/otacerts.zip
If it shows "testkey", you won't pass Device verdict even with valid fingerprint.
As I have checked on the latest ArrowOs 13.1 20240203, it is signed by a testkey. Please release a version signed by a something other then that testkey. Thank you in advance! ❤️