@nprofile1q... Is it triggering a Play Integrity API notification? It looks like it is that's only displayed as an option in the app settings when an app is using it. That means they're likely checking Play Integrity API responses on their server and enforcing basic, device or strong integrity.
You should try using a Play Integrity API checker app to see if you're passing basic which you should be.
Device and strong integrity are 2 tiers of assurance for Google certification which bans any other OS.