Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
The only two Roku devices that support Dolby Atmos on Netflix are the Roku Ultra 4800R (the model that was released in 2020) and the Roku Streaming Stick 4K (that was released late last year). This is due to the fact that Netflix requires that a certain Dolby chipset (usually one that supports both Dolby Vision HDR and Dolby Atmos) be installed on your hardware. Currently, those are the only two Roku devices that support Dolby Vision HDR. I upgraded to both of those devices last year, and am currently receiving Dolby Atmos on Netflix.