Bitwarden Authenticator is a standalone app that is available for everyone, even non-Bitwarden customers.
In its current release, Bitwarden Authenticator generates time-based one-time passwords (TOTP) for users who want to add an extra layer of 2FA security to their logins.
There is a comprehensive roadmap planned with additional functionality.
Available for iOS and Android
I’m not putting my totp with my password, same as I’m not putting my password with my email (proton)
It’s a separate app with no sync to Bitwarden accounts.
Still, I bet they share a lot of the same backend and personell.