2020-08-17, 19:57
I don't have experience with passthrough, but I believe (and your screenshots say) that the # of channels setting does not apply to passthrough, which you have enabled.
If I understand correctly, passthrough should allow output of unaltered Atmos if all elements in your audio output chain support that.
So, a next check could be getting other Kodi Atmos content (outside of the Netflix add-on) recognised as Atmos by your output device.
Once that's confirmed you can try for the same with the Netflix add-on.
Other Kodi subforums may be better suited if you need further help with Kodi + Atmos + passthrough + your output device.
If I understand correctly, passthrough should allow output of unaltered Atmos if all elements in your audio output chain support that.
So, a next check could be getting other Kodi Atmos content (outside of the Netflix add-on) recognised as Atmos by your output device.
Once that's confirmed you can try for the same with the Netflix add-on.
Other Kodi subforums may be better suited if you need further help with Kodi + Atmos + passthrough + your output device.