Bitwarden has a CLI also, both the official bw-cli and the nicer rbw. Can't speak for iOS but on Android bitwarden plugs into the OS password manager autofill API, same as everyone else, don't see why enpass would have a different experience.
Well, that's what I want to find out! Very rarely does autofill work for me on Bitwarden mobile - 80% of the time I have to open the app, copy, and paste my info. Not good password field recognition, and it's a regular friction point for me.