[pkscout]

So it seems that Kodi should be able to differentiate. Why it doesn't?

Audio Profiles uses a JSONRPC call to Kodi to get the audio stream details.  The specific call is Player.GetProperties, and the specific thing Audio Profiles asks for is the current audio stream, which returns a Player.Audio.Stream object.  In that object is a string for codec which returns one of the follow values from what I can tell:

'dtshd', 'truehd', 'ac3', 'eac3', 'dts', 'dca'

If you want Atmos returned as a valid value, you need to submit an issue to the Github repo at:

https://github.com/xbmc/xbmc

If the issue is worked and Atmos is added, then I can update the addon to differentiate Atmos.