Strikes me that the bigass independent Rhineland would be mad unpopular with the Germans, and, frankly, the Rhinelanders themselves.
Its independence is probably temporary, it's under a special league of nations/French mandate, just hard to fit that into the labels on the map. I haven't ironed out the details yet but it will likely rejoin Germany between 1935-1939/1940. It was forcefully detached as a stipulation of Versailles, the French will try to bolster / stir-the-pot of Rhenish nationalism like OTL (though likely to an insufficient degree) and eventually once the specified number of years has elapsed, a plebiscite will be held and it will probably rejoin Germany (like OTL Saarland but bigger). The biggest problems with this are the French (and possibly their allies) maintaining a garrison or occupation force there during this period because of the sheer expense.