I had this same issue for years on Android with Bitwarden. I’m not sure how the password manager related APIs work to make it appear on android, but since switching to iOS, it always presents me with a generic “passwords” option, which then gets me to Bitwarden. Sometimes it’ll flag the specific account, but not always - this seems to be like the android quirk. I’d much prefer if android has that generic “password” option at all times, even when it didn’t know Bitwarden had an account for this service.