There is no such test request for module. In module datasheet, there is a mechanical & environmental tests table for your reference. Also please use English for the topic in case other users can understand it.
Translation: How much weight (pressure) can the Xavier module withstand?
If the four corners of NV AGX Xavier are connected with screws, will the m3 combination screws crush the module structure？
No, why do you think so? The screws are for module to connect to carrier board.
After the AGX Xavier module is tightly tightened with m3 combination screw, the surface is dented. Will it affect the normal use of the module?
No for normal usage.