You can use Apple TV as a conference room display so that anyone can easily share their screen from a Mac, iPhone, or iPad using AirPlay. When Conference Room Display is turned on, a message appears on the display with AirPlay connection instructions and wireless network details.
Go to Settings remote as Apple TV restarts. This temporarily unlocks Conference Room Display mode. For more information, see the Apple Support article If you're asked to enter an AirPlay password on Apple TV.