You’re using Roblox materials? I doubt you can export those. I thought you had custom materials. If you do, you can go to material manager, click the variant, and the texture maps should be visible
The purple one is a normal map. It’s what tells the lighting about bumps on your material, allowing it to have fake scratches and other bumps.
I’m going to assume that the brown one is your color map. It’s what holds the main colors.
You’re missing a metal map (greyscale map that indicates the amount metal on specific areas of the mesh)
Also, roughness, which is greyscale too, and indicates where to make things shiny/not shiny.
You can create a new material in blender, and drag the color and normal map in to it, and connect them to the shader. You may want to add a bump node between the normal texture and the shader.