[SparkyMcUnicorn]

There are a bunch of different ways to do exactly this. Definitely would be nice if it was a built-in feature.

Just have to hook up a mic to listen, and tune the audio level results so it's somewhat smart.

For TVs that connect to your network, there might be a built-in integration, or you can keep it simple and write API calls yourself in node-red.

If you have a dumb TV (not internet connected), then you'll probably be limited to solutions involving IR Trasmitters via MySensors[0] or EspHome[1].

[0] https://www.mysensors.org/build/ir [1] https://esphome.io/components/remote_transmitter.html