Thread has been locked due to being derailed with misinformation. Using privileged microG does not result in an OS/device being considered Google certified. You would be better off using the stock OS. The only way to trick the Play Integrity API check for Google certification is to pretend to be an old, insecure device and they're actively cracking down on it. Strong verification mode can't be bypassed via spoofing and they're gradually making the non-strong mode equivalent to that, but it still passes on devices not supporting strong verification so that leaves a loophole. Pretending to be an insecure, old device to trick it is only a temporary workaround and is very fragile. They're actively banning the build fingerprints used for spoofing at scale. The remaining projects offering this have to start giving users configuration to set a build fingerprint, etc. since if they do it themselves at scale, it gets banned. There was no reason to revive this old thread, and the misinformation has been removed.