Is it possible to control the Apple TV with the LG Magic Remote?
I found a really gross workaround.


Buy a learning universal remote. I used this old thing
After selecting any "DVD/Bluray" make from the LG TV UI, have the learning remote learn the keys you want to use for ⬆️
With both remotes, sit by the Apple TV and hold and/or mash that key. After a dozen or so tries the Apple TV should eventually fill its progress bar and accept it.
Repeat for ,⬇️,⬅️,➡️, OK, and Menu. Note that the button in the center of the magic remote and most settings buttons around it are not programmable, so I had to settle for "O" to mean "OK" and "8" to mean "Menu"


Not ideal, but better than nothing. LG Magic Remote now works fine for navigating the Apple TV