I think the textures are corrupted. They don't show up in FBX or OBJ formats. I also can't import the GLB format into Unity. They open just fine in Blender, and the textures are visible there. Why is there a problem in Unity? I've tried many different approaches.
Check this out. It shows up when I import it into the blender in GLB format. But it doesn't show up when I import it in FBX or OBF format. I can't import the GLB file into Unity either :) How can I fix this?