Provided you know the secret key to a government-issued certificate. Making it impossible to copy said certificate is not really a requirement for identity verification.
Rooted, wildly insecure devices can pass the attestation easily: https://magisk.dev/modules/play-integrity-fix-inject/
Safe, updated devices cannot unless they permit Google to run their surveillance services in the privileged, unconstrained mode.
I think we need some fingerpointing that EU officials strive to avoid.
Authorities/anyone could verify that it's not counterfeit. And photo should be checked anyways to match the person.
So I also don't see the need for attestation. For ID check it should be ok without. For signing stuff ofc it is not resistant to copying. But EID smartcard function already exists.