Thanks for the info! Omg I totally skimmed past the part in the UE docs that shows how to add Customized UVs to a material. 
I just didn’t see them by default and figured that it was another UE feature that didn’t make it from UEFN.
Interesting tip about FN meshes handling the tiling in the model UVs instead of in the material. I hadn’t noticed that.
Do you personally have any specialized cases where you do use Customized UVs?