Hey Max,
The problem is two-fold; the Position of your Object, its Origin is at the World’s Origin, but the Mesh is kilometers away! (Also look at the necessary View Clipping):

No wonder you can’t see/find it. (Take a note, that when the Start and End Clipping range is too large, you get glitches.)
And its size (I put it at the Origin for clarity, but look at the Vertices Positions!)):

The whole list of Materials all are the same default Principled Shader, don’t know if that is intentional…