In this tutorial, I will show you how to add rebar to destructible building and improve the destruction debris. The Fracture Mode comes with tools to embed additional geometry to the fracture simulation. The primary purpose of embedded geometry is to add a layer of visual complexity to augment the simulation. For this reason, embedded geometry does not have any collision nor is it considered part of the simulation.
https://dev.epicgames.com/community/learning/tutorials/Ob1M/unreal-engine-how-to-add-rebar-using-embedded-geometry-tools-in-chaos-destruction