This tutorial shows how to make rubble and bring it into Unreal Engine. You will learn how to make rubble and the associated collision in Blender 4.1. You will then be shown haw to import the rubble and collision into Unreal Engine 5.4. The final render was done in Unreal Engine.
https://dev.epicgames.com/community/learning/tutorials/dBRw/rubble-blender-to-unreal-engine-5