Blender for Unreal Engine uses the FBX to export static and skeletal mesh. "Only basic materials are supported by Unreal's FBX pipeline. Uncommon map (texture) types will not be imported." And Blender material nodes don't seem to transfer texture into the FBX when exporting.

I recommend to create your material in Unreal Engine and use Material Search Location to automatically link the materials to your mesh. Material Search Location will link the materials that have the same name.

I'm looking to use glTF in future instead of FBX

• UE Docs: Importing Materials Reference
• For community support and discussions, join the discord BleuRaven Side Projects.

• Download: AssetsExample_Material.blend