Epic Games’ Senior Technical Animator Kaye Vassey showcases the Blender add-ons “Send to Unreal” and “Unreal Engine to Rigify” which allow for asset importing and updating directly from Blender to a running session of Unreal Engine.
https://dev.epicgames.com/community/learning/talks-and-demos/n2e/how-to-use-blender-with-unreal-engine-unreal-fest-online-2020