I have scenery at FAOR. X-Plane will tell you exactly what scenery tile you are missing. Check in Global Scenery > X-Plane 11 Global Scenery > Earth nav data > then in the folder for the scenery tile. Check if the scenery tile X-Plane is missing is in the folder it should be, and if it has 0kb size. If it does, you will need to delete the tile and then add the scenery through the installer. X-Plane can't use the 0kb files, but the installer thinks you already have it installed.