My Siri Remote trackpad has stopped working, but luckily I have a leftover Tivo remote. I set it up to control the ATV including the playback controls and it was all set. For navigation and selecting it works fine, but playback buttons don’t seem to affect Channels. Playback buttons work fine in other apps (Netflix, HBO GO). The ATV light blinks so I know it received the request.
I hope this is supported by Channels soon, because then I’ll have one remote that finally does everything, instead of juggling 2 remotes… and the Tivo remote is pretty sweet even without a Tivo.