GLTF Loader Materials Blender

Dear Three JS Community,

I exported this blender file as GLTF embedded to put it into my website via Three JS´s GLTF loader. I am wondering why all materials get shown black and white. Is it because GLTF can only load one material? Or should I rather export it seperated from blender (GLTF + Bin)? And how about metallic or transparent materials, is GLTF loader able to view them? Is it better in eevee or in cycles?

sorry for all those questions, I am still a beginner… :smiley: