Direct call UI question

When a direct call is requested from a user, a message appears in the form of a push notification.

I would like to know if there is a UI where the call comes in fullscreen rather than in push.
(I want a UI that looks like an actual phone call.)

If I understand correctly what you mean, using the SDK you need to build this screen.

@crom08 if you’re using the default callkit of ios and call manager in android - it’s upto the OS to modify the default incoming call UI
If you are not using the above, then you can create the required screen for it in your app by yourself.
Although - if the app is completely killed, then you will not be able to open the app automatically and show the screen.