Airplay freezes up on some of our iOS devices when screen mirroring to our TCL ROKU TV 4K HDR. On other devices it just won't plain screen mirror at all. It asks for the code just fine, the screen just shows up all black. Funny. At times there is audio casting. Just not screen mirroring.
Devices freezing: iPad Air 2020
Devices that connect but black: iPhone 8 Plus, iPhone 11, iPhone 12 mini