I just bought a Roku streambar Pro I have the surroundsound speakers and the subwoofer it does not seem to support Dolby Atmos but it says on the box it supports Dolby, am I missing something?
Dolby Audio <> Dolby Atmos
Not all Dolby is Dolby Atmos, and just because a product mentions Dolby support doesnt mean it supports Dolby Atmos, and there are different degrees of Dolby Atmos support.
All that said, the SBP supports Atmos.
What apps/sources have you tested to determine that Atmos isnt working?
Have you checked NetFlix/Disney+/HBO Max/Apple TV for Atmos tagging and playback?