How to Use AirPlay on iPad

Step1: Open the Control Center. Swipe down from the upper-right corner of the Home screen.

Step2: Tap Screen Mirroring.

Step3: All devices available for AirPlay appear in this menu.

Tap the name of the device you want to connect to your iPad. To turn off AirPlay,
go to the Control Center, tap Screen Mirroring, then tap Stop Mirroring.

Credit : https://www.lifewire.com/step-by-step-instructions-to-using-airplay-on-the-ipad-8764239