Screen mirroring
How can I mirror my screen to my LG with Apple TV app
iPad Air 3, iPadOS 13
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If your TV is AirPlay-enabled, then it will be selectable as an AirPlay Screen Mirroring destination.
List of AirPlay 2-enabled smart TVs - Apple
AirPlay destination devices may need to be added to the Home in the Home.app (on iPad or iPhone), and be assigned to a room.
Add a HomeKit accessory to the Home app - Apple Support
If your TV is not AirPlay-enabled, then you will need to connect a streaming device that can provide AirPlay receiving functionality. That can be an Apple TV set-top box, or select third party device.
AirPlay functionality is separate from the Apple TV app, although there is overlap for supported TVs. It depends on the exact model, though.
