Multiple Materials on an Object

Hello,

I am working on a game and I have made some buildings in Blender. However, when I was trying to import the textures into Unity, I realised there is an issue with the different construction materials on it, such as window glass textures vs the rough wall texture.

If I were to bake everything onto one UV map to help with performance, and then import, I don't seem to be able to make the glass glossy while keeping the wall rough. I also cannot find a tutorial on shader graphs that deal with this.

Is there anyway I can use one UV map while being able to tweak the smoothness and normal maps for different parts within it?

Thanks in advance!