I'll post the same response I replied to other on a different thread:
Wild that you (and a few others) continue to make these accusations about me in these comments (and in other venues).
1) I've been one of the most vocal proponents of synced passkeys never being attested to ensure users can use the credential manager of their choice
2) What makes you think I have any say or control over the hundreds of millions of websites and services in the world?
3) There is no known synced passkey credential manager that attests passkeys.
tl;dr attestation does not exist in the consumer synced passkey ecosystem. Period.