In this lesson, we will learn how to add tiling (the ability to scale textures up or down) to the material we created in the previous lesson.** We will slightly enhance our material, and then we’ll organize and sort all the variables we have added.
https://dev.epicgames.com/community/learning/tutorials/d6wx/how-to-add-tiling-materials-in-unreal-engine-5-for-beginners