I would like a sample React Native app that shows how an app accepts incoming calls. For iOS apps I understand this will use CallKit, for Android apps this will use ConnectionService.
You should be able to show the message (push message or other) that is sent to the phone in order to make the phone ring. Once a call is accepted by a user, you should open the app and send the user to a demo welcome screen.
You can use established plugins where needed.
This demo does not need to look amazing, I am more interested in the functionality.