Basically this AnswerHub question sums it up: https://answers.unrealengine.com/que…-procedur.html
… We have the GetSectionFromStaticMesh function, but it’s not for Procedural Mesh Components.
Example use case: We want to slice a mesh and then add it to other Procedural Mesh Component as a new section (all procedurally). For this we need all the sliced mesh data, vertices, triangles array, etc. But there’s no way to access any mesh data of ProceduralMeshComponent.