Yamaha RX-A1080 Dolby Atmos settings

[cornersandsills]

Good day; you friendly bunch.
I have a fire stick 2022 version that supports 4K Dolby Atmos and I have the above mentioned Yamaha.
When I play a Blu-ray the Atmos is activated however when I stream from my fire stick a movie from Disney+ for example that has the Atmos logo above the movie title my Avr displays Dolby digital plus and not Atmos, I have gone through all settings I can find on the fire stick so I am left thinking that I am missing some settings on my Yamaha, can anybody help please? I have looked in this forum for a specific Yamaha RXA 1080 section but found nothing so I’ll leave it here.
Thanks in advance
TONY

 

[Tricky-Ricky]

Does your TV support Atmos pass through? Presuming you have the AV receiver connected via ARC.

 

[cornersandsills]

Thanks for coming back to me. No I don’t think it does, it’s only my AVR and firestick. As soon as I get home I’ll check but I’m pretty sure it doesn’t. It’s a Samsung ue78ks9000t