"New to the solar system myself"
Where from?? Sorry couldn't help myself
To Rodeo, If you're handy with a volt ohm meter, you can easily check the solar output.
I don't know anything about the "app" or software but operationally you can check what voltage is coming into the controller. That will tell you if the panels are connected. The controller should have it's own read out but that will vary based on the battery state of charge.
Your trailer wouldn't happen to be plugged into shore power while looking at the solar app by chance??