Mine: require setting a URL to support password managers. You download an app, go to login, tap the password field, and open Bitwarden. Does it find your login? Half the time, nope! The dev didn’t tell Apple one time what their URL is, so everyone now has to search their password manager every time.
Our point was that it doesn’t need to involve app developers at all, it should just be handled by the OS automatically.
It doesn’t hurt to look over the fence and see what works.