Roon core NUC8i7 can't recognize Marantz AV10 HDMI port

I want to play Tidal Atmos music through Marantz AV10 decoder.

However, my Roon core (NUC8i7) can’t recognize Marantz AV10. Now I can only play stereo music through AV10 Airplay mode.

Roon does not (currently?) support Dolby Atmos, it only supports multichannel audio.

To play Tidal ATMOS to an AV receiver you need Apple TV 4K (instead of Roon) HDMI output. In order to use Apple TV 4K you need to be an iPhone user. (Only) if you are not an iPhone user, then you can check out Fire TV 4K Max, or the latest version of Nvdia Shield, with potentially more configuration difficulties.