I *think it's the case that Apple TV doesn't passthrough TrueHD Atmos Audio. I believe it does do compressed Dolby Digital Plus Atmos for the streaming apps like Netflix/HBOMax/Peacock, etc., but again, I'm not sure it even does that for Jellyfin/Moonfin. In short, I think it's an Apple TV issue, but I'd love someone else to look into this too.
I *think it's the case that Apple TV doesn't passthrough TrueHD Atmos Audio. I believe it does do compressed Dolby Digital Plus Atmos for the streaming apps like Netflix/HBOMax/Peacock, etc., but again, I'm not sure it even does that for Jellyfin/Moonfin. In short, I think it's an Apple TV issue, but I'd love someone else to look into this too.