E-ACR Dolby Atmos support check

Hi everyone,

I’m trying to get my Dolby Atmos setup running. My soundbar indicates Dolby Atmos for Netflix or ATV+. So I’m thinking I have at least my wiring right. Howeve, I don’t seem to get it working via Infuse (same for Plex).

I’m aware that it won’t work on TrueHD streams, but even with Dolby demo video’s in E-AC3 Atmos, my soundbar doesn’t indicate it as Atmos.

I have a Samsung HW-Q80R soundbar. Unfortunately I don’t have Bluray player of Shield to double-check that way.

Any ideas of I might be missing?