Bitwarden does currently support FIDO2 WebAuthn for MFA verification in addition to your master password for vault unlocking.
Bitwarden doesn’t support using these “passkeys” to login in leui of the master password yet, but there is a current similar feature request for this to be supported. Though like most things in adopting to FIDO2 password less login fully will take quite a bit of engineering on the backend to integrate.