Ohh- hm. The dealership must have put new tires on it though- cause the tires are perfect. And it is still under the powertrain warranty…
What else might I need to check out for unexpected wear and tear from it being towed?
Being told you have warranty from the sales part of the deal, may be a different story when the service part of the house sees signs of being flat towed and alterations to the electrical system. In my experience with dealerships in my area since Chrysler's demise, warranty work is more about providing evidence it should be covered rather than customer satisfaction.
If you have no use for the tow-behind stuff, I would take it off asap. That electrical plug up front could be run all the way to the back and spliced into the rear lights.
Look for other stuff that may have been done too. Such as features disabled to co-exhist with being towed. Stuff like the ignition, vehicle key security, and battery modified. Just some thoughts, I have never flat towed myself.
For sure I'd have the differential and transfer case fluids not just replaced, but checked for signs of parts failure. (water, burning, etc)
Check all the suspension bushings, ball joints, wheel bearings, etc. Basically a full rundown as if you'd bought a high mileage vehicle.
