Starting in iOS 15.1 and iPadOS 15.1, you can share your screen in a FaceTime call.

To learn more about this topic, visit the following articles:
Share your screen in FaceTime on your iPhone or iPad: https://apple.co/3jFJZ1N
Watch movies and TV shows together in FaceTime on your iPhone or iPad: https://apple.co/3EhjwiV
Use Group FaceTime on your iPhone, iPad, and iPod touch: https://apple.co/3bdas29

Additional Resources:

Contact Apple Support for iPad: http://apple.co/iPad

To subscribe to this channel: https://www.youtube.com/c/AppleSupport

To download the Apple Support app: http://apple.co/2hFtzIv

Apple Support on Twitter: https://twitter.com/AppleSupport

For more videos, go to Youtube Apple Channel