Just wanted to put this out there for whoever finds it helpful. I like a lot of other people have had issues getting Atmos from my Arc with my Apple TV 4K and my Sony tv (75x850f) no eArch. The Apple TV would do nothing but DD but I could get Atmos through my TVs Netflix app but that’s all. So today I changed over to a Nvidia shield tv 4K and now I get Atmos in Netflix and Disney+. I know this is not the answer some of us want...but it works.