I'm setting up a URC MX-990 remote control for my 2nd gen Apple TV 4K + Channels DVR.
Most buttons are working, but some that work on my Shield aren't working on the ATV4K.
-Previous Channel
-Red/Green/Blue/Yellow
I noted in the specs that pressing "Play" twice should achieve previous channel but that's not working for me either.
I do NOT have access to CEC, so that's not an option for me.
I can add limitless soft-buttons of course. But here's a picture of the programmable hard buttons:
