There was something you misunderstood. I was saying that in my recovered version there is nothing in the scene, that’s because I could only recover the components and materials, and couldn’t recover the model scene content. I’m sure that your original file does have content in the scene.
So, from the recovered file I gave you, you would look through the Components panel to hopefully find large chunks of the scene. You then would rebuild the scene by moving the bigger components back into the right place.
The thumbnail image for the file is only an image, it isn’t a render of the current state of the file, though in a normal file it would look like it is.