HDMI-CEC Support for Apple TV

Nope, you cannot control the Apple TV with CEC commands, period. The only way you can control the Apple TV without a physical remote is with an iPhone or iPad using their included remote apps. The Apple TV can control other devices via CEC, like a TV or AVR, only in terms of turning them on/off, volume up/down, and some input selection. That’s it.

I’m not sure what your intended use is but the Apple TV does not have a firmware interface that can be accessed over a network for example. It’s a streaming box intended to be connect to a display.

It is supported, please look at If you can't control your TV or receiver with your Apple TV Remote - Apple Support

. Please read it carefully.

What Apple TV model are you referring to??? If you are referring to the current Apple TV 4K model please click Apple TV User Guide - Apple Support