You can use Simple Play Integrity Checker on IzzyOnDroid (fdroid repo) or the play store. It also checks safetynet.
If gpaywallet works that would indicate 2/3 play integrity if your android is recent I think, so it might be unrelated to the api. 3/3 isn't enforceable yet afaik, too many legitimate devices can't pass it.

Apps can still bring their own root checks, but magiskhide should allow you to pass those.
Unless the app is quite nasty and checks for the mere presence of apps that don't do much without root or xposed, in which case there are also modules that allow you to limit what apps other apps can see being installed (really seeing installed apps should be a permission, but sadly it isn't on most roms yet)

No, I have Magisk which is probably what it is. I'm still used to the r/LineageOS rules where you're not allowed to even mention the existence of Magisk. lol

Magisk