Comment by Cider9986

I assumed that the accessibility one is non-standard and Bitwarden's uses the system native one. Because I see Bitwarden in passwords and autofill in settings (or something along those lines). I find it to work way better than on iOS anyway.

I don't think that the visual indication means they aren't using the system way. The accessibility service is probably not a good idea given how much control it can give the app over your system.