

It also can be led by software version or other software problems. Except for network issue, if your AirPlay feature is turned off, AirPlay will not show up either. For example, your iPhone is not on the same Wi-Fi with your Apple TV, it is sure AirPlay not showing up. If you can't find AirPlay icon on your iPhone, iPad or Mac, you need to consider whether the two devices you want to connected with AirPlay are in the same network or not.
The most common reason which can cause your AirPlay not showing up is the network problem.

As you know, AirPlay is a good function of Apple to share video and other files between different devices, especially iOS device, Mac and other compatible devices.
