Passkeys are just software backed FIDO keys with no attestation and less features. FIDO is flexible enough to distinguish userPresence (I.e., touching the key)

Passkeys are just software backed FIDO keys with no attestation and less features. FIDO is flexible enough to distinguish userPresence (I.e., touching the key) from userVerification (commonly, entering a PIN), but this is only defined for physical keys IIRC.