Huh, it works just fine in the UK. Wonder if they have different builds (or completely different apps) for different regions. Or maybe it's the GrapheneOS compatibility layer that makes it work? Not sure.
Play Integrity has several levels. GrapheneOS MEETS_BASIC_INTEGRITY, which I believe only requires a locked bootloader and no superuser.
There's also been some discussion of spoofing MEETS_DEVICE_INTEGRITY, since before Android 13 it didn't rely on a TPM, and many apps don't want to lock out older devices, but it's been decided against it [0].
Play Integrity has several levels. GrapheneOS MEETS_BASIC_INTEGRITY, which I believe only requires a locked bootloader and no superuser.
There's also been some discussion of spoofing MEETS_DEVICE_INTEGRITY, since before Android 13 it didn't rely on a TPM, and many apps don't want to lock out older devices, but it's been decided against it [0].
[0] https://github.com/GrapheneOS/os-issue-tracker/issues/1986