The speculation is that it has something to do with the hand off to and from
Apple AirPods somehow messing things up. While it’s not a bad theory, our
original Apple TV remote actually continues to work just fine.
Check the remote’s battery
To get things moving again, the first thing to check is the battery level of the
Apple TV remote. At least once, the volume just stopped working when the battery got to a certain level. Plugging the remote in immediately got things working again.
Granted, this may have been completely anecdotal, but worth checking
Restart your Apple TV remote
That said, our current go to solution for when the volume controls stop working is to hold down the display button (the one with the little TV / monitor on it) and the volume down button. Very similar to how we resolve an issue with the Steam Deck.
It only takes a few seconds, and you’ll notice that the light on the Apple TV will turn off and then back on again.
At this point, your Apple TV remote volume controls should be back in business and we’re off to the races to watch TV and whatever volume we so desire.
I didn’t want to post this until we had tried it a few times, and I’m happy to
report that it’s consistently resolved our issue three times thus far!