Currently use 2FA with a proton account, you have to either use a 2FA app or a security key. This is unfortunate to people who dont always have thier phone on them.

Bitwarden (my current pass app) supports doing the 2FA app AND any email I choose simultaneously.

Not having the option to use an email is the primary reason I am only using proton for mail and not any of the other apps because I could never give up BW if I ever wanted to get into my proton account.