Yes you could do that easily.
In the uTool where you create the songs there’s the internal mixer settings where you can set up the level and pan for each track. Mainly this feature can be used to set up the levels for dowmix to headphones out. But there’s an option in the Menu/Playback/Multitrack Mode Option/Outputs Pre/Post. If you select the post fader mode in this case the outputs of the uTrack24 will follow the pre-definied levels from the uTool mixer