Sonos immersive arc ultra set - what happens with dd 5.1 signal

Hi,

I am curious about what height channels do when they receive a 5.1 signal. Does sonos upmix it somehow to give you anything at all or they just not used at all?

The only reason i asked this, when visited a friend of mine and he played venom the last dance but he realized half way the movie we were watching it 5.1 (apple tv audio output thingy) but we both felt we were in a bubble and i wondered if samsung was upmixing to use height channels too.

So i wondered if sonos does anything in that respect.

Thanks

Edit: i forgot to mention, my friend’s system was samsung q990d hence i got curious about sonos