Can i export shader nodes as fbx file?

I did a rusting work like this, but when i do export it as FBX file, i can’t see it as a material in Unity because it’s a shader, not a material… Can I make these nodes look like material ? Or what should I do to make it appear in Unity ?

You can’t export your shader network like that. Just bake the textures as regular PBR setup (albedo, normal, roughness etc) and load them in Unity.