How to screen record for IOS

Record the screen on your iPhone, iPad, or iPod touch - Apple Support

If screen record is not an option in the control center,

1. Go to Settings > Control Center, then tap the Add button  next to Screen Recording.
2. Open Control Center on your iPhone, or on your iPad.
3. Tap the gray Record button , then wait for the three-second countdown.
4. Exit Control Center to record your screen.
5. To stop recording, open Control Center, then tap the red Record button . Or tap the red status bar at the top of your screen and tap Stop.