This might put to the test the Rivian service center claim that the rear hatch can't be adjusted because they can't make it waterproof outside of the factory. The upper hatch looks undamaged, though. Good news.
The whole side of the vehicle is on piece right up to where the front fender begins.It looks like the rear quarter panel is one piece including rear and front door frame. If that is the case, it would be extremely (expensive) to fix it.