My Airpods Max can pause and resume video content I’m watching when I press the digital crown or take them off.

I expected this to work with the Sonos Ace using TV audio swap as well, but it doesn’t. As far as I know, HDMI-CEC supports play / pause operations, so the headphones could tell the soundbar to tell the TV to play / pause.

Is this feature infeasible for some reason, or is this something that could be supported in the future?