Hello, I have exactly the same set up as you, 4K Apple TV and BV 10 40, mine works flawlessly and wakes both tv and Atv from my beoremote one. I think that likely means that the PUC codes differ in some way? My dealer set mine up knowing which version of Apple TV I’d be using. either that or something in your settings, at least you know it is possible. Sorry I can’t be of any more help.
James
Beovision 10, Beoplay V1, Beolab 17, Beolab 9, Beolab 4, Beosound 2, Beosound Moment x 2, Beoplay M3, Beogram 1700