[martin_k]

> Unless the service you are trying to use requires that you use a particular model of authenticator, which the service provider can enforce via attestation.

Android's implementation of passkeys currently does not support attestation. https://groups.google.com/a/fidoalliance.org/g/fido-dev/c/nh...

Neither does Apple's, I believe.

[Mindless2112]

Good to know! Hopefully this kills off unnecessary use of attestation.