I'm already seeing Bitwarden as an option for Passkey authentication on iOS! Apparently the app already exposes itself to iOS as a WebAuthN backend (or the API is the same as that used for password managers).
Unfortunately that API doesn't seem to be wired to anything in the app yet, so selecting it inevitably fails.
Unfortunately that API doesn't seem to be wired to anything in the app yet, so selecting it inevitably fails.