Open Control Center on your iPhone or iPad
Tap Screen Mirroring
Select the Apple TV or AirPlay-compatible device you want to use
If prompted, enter the AirPlay code shown on the TV/device
To stop mirroring, open Control Center again
Tap Screen Mirroring
Select Stop Mirroring
To AirPlay from a specific app, tap the AirPlay icon in the app
Select the target Apple TV/device
Use the TV/device volume controls or the app volume controls as needed
Ensure your iPhone/iPad and Apple TV/device are on the same Wi‑Fi network
Ensure AirPlay is enabled on the receiving device (Apple TV: Settings > AirPlay and HomeKit > Allow Access)