Does your TV sit into a large plastic housing that goes back to nearly the windshield and cosmetically covers up all the back of the TV and the mounting system? If so, take a look along the top of that. If it's like on my 2007 Journey, there are screws at the top of that to hold it in place. If you remove those, you can drop that housing and see inside to all the mountings. The mountings on mine are substantial metal structures literally welded to the motohome frame at the top. Once you can see inside, you can perhaps see what all holds the current TV in place.
When I purchased my RV, it already had a new flatscreen installed. Whomever did that before I bought it removed the old TV, installed some structure to mount the flatscreen TV mounting bracket to such that when the TV was mounted to that, it sat right over the edges of the wood facing of the outside of the TV cabinet. A little trim around the new screen and done. In my case, rather than using wood-grain trim and trying to match the cabinet color, they used black trim to match the TV and it looks just fine.