Bitwarden users who store their email account credentials within their Bitwarden vaults would have trouble accessing the sent codes if they are unable to log in to their email.
To prevent getting locked out of your vault, be sure you can access the email associated with your Bitwarden account so you can access the emailed codes, or turn on any form of two-step login to not be subject to this process altogether.
This is why I turned on 2FA with Aegis and soon as I heard this news. I set them up with two passwords I remember well, and have biometrics set on both apps so fingerprint is all I’ll need 9/10 times.
I did it years ago when they sent me an email suggesting to do exactly that.