In the Wwise-201 DAW session, you see numerous tracks. Most of these tracks are only used for 1 of the 7 Music Segments, so the majority of each track contains no music. Many DAWs provide track folder features which let you collapse all of the tracks for a given piece of music into a single track. When needed, a folder track can be expanded to reveal its contents. You can see the folder tracks representing each of the Music Segments are currently collapsed.

Below, you can see the COMBAT music folder track is expanded.