App shares with FaceTime during Group Activities

My app passes data across a Group Activities session on a FaceTime call. It requires that the user can see the video coming from the other end.

A normal call on the iPhone only sees a PiP video.

On an iPad, the user can divide the screen between the two apps.

An iPhone user may not be familiar with the iPad UI. Is there an API to divide the screen between FaceTime and another app, automatically?

Group Activities with PiP Video

iPad FaceTime Full Screen Video

Two Apps Sharing the Screen

App shares with FaceTime during Group Activities
 
 
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