I have recently migrated from Lastpass to Bitwarden - the final straw was submitting a 2FA bypass bug, via their bug bounty, and being told it was a duplicate from 2015! (still not patched).
Bitwarden’s 2FA is currently enabled via Google Authenticator codes (Authy).
I saw the option for Cisco Duo to be used with the Premium version of Bitwarden. I’ve registered for a free Duo account and I’ve enabled push notifications.
One thing I can’t see, is an option to unlock/confirm the phone’s push notifications using biometrics. I was previously using the LastPass authenticator app and that required biometrics to confirm login attempts. Authy also uses Biometrics to unlock the 2FA vault.
Does that feature exist in Cisco Duo?