Chances are very good that Blender cannot find your textures. The reason why is that Blender is kind of stupid, by default, for not using relative paths.

How to Find Your Missing Textures in Blender (3.5)

Open up the Blender .blend file, then do the following:

1. Go to menu File > External Data > Find Missing Textures. Blender will open a dialog where it thinks your textures are located.
2. Using the Open Dialog, navigate to the directory where the Textures are located
3. If you are not already in Viewport Shading > Material Preview, then select it