I have an LG C1 OLED tv with an Ultra HD Sky Q box.
My setup is a Sonos Arc + Sub + 2 One SL speakers.
Sound out: HDMI ARC
DTV Audio Setting: AUTO
HDMI Input Audio Format: Bitstream
Digital Sound Out: Pass Through
eARC: Enabled
I tried for months to receive Dolby Atmos whilst watching Netflix without success until now…
Instead of accessing Netflix through my Sky box, I opened Netflix via the app on my tv. I selected “All quiet on the Western front” movie, knowing it was capable of streaming Dolby Atmos and there it was… Dolby Atmos instead of streaming 5.1 which is what I only received using Netflix through Sky.