Currently I have a Samsung 65” from a few years ago and a Samsung soundbar and rear speaker system with Atmos. Like a lot of people, I have to choose between Atmos and no HDR video, or HDR video and no Atmos, because my slightly older TV won’t detect and passthrough the Atmos audio over ARC.
Are there brands of TVs that aren’t crazy expensive like TCL that have eARC that will actually let me have my cake and eat it, too? I’m not interested in going the AVR route, although I’d consider replacing the soundbar/speaker system with another similar thing if it would pass through HDR.
You could get an HD Fury Arcana. At $249 it is not cheap but its main feature is an eARC adapter that will allow you to do what you need without replacing the whole TV and is cheaper than a whole new 65in TV.
https://hdfury.com/product/4k-arcana-18gbps/