Can not get screen mirroring to work.
Can not screen mirror. No tv icon
What is your AirPlay sending device? And OS?
What is your model AirPlay receiving device? Identify your Apple TV model - Apple Support. And OS?
What type of content are you trying to AirPlay? Not all apps and content support AirPlay to all devices.
If screen mirroring or streaming isn't working on your AirPlay-compatible device - Apple Support