I’ve tried Atmos via AppleTV and multichannel from my roon core via HDMI. My HDMI switch, worth a few hundred bucks HD Fury Vrroom and Vertex, can both passthrough ATMOS to my receiver but the RS130 can not. This is not an AppleTV issue this is Rose is not passing through formats untouched as they claim they can/do.
It’s a shame but honestly if you have other MC sources, use them and your AV receiver.