Learn how you can Create splines completely procedurally from PCG points. Manage sets of PCG points to make working with custom attributes easy for you. Sort Attributes so that you can have your PCG points in the right order for proper generation. Learn how you can Select first or last points so you can have special logic in your subgraphs.
https://dev.epicgames.com/community/learning/tutorials/Zeov/unreal-engine-create-dynamic-splines-from-pcg-to-generate-a-sidewalk