Epic Games has released Send to Unreal and UE to Rigify. These are their plugins for transferring rigged and animated characters between Blender and Unreal Engine. The idea is to be able to create a one-click system to import rigged and animated characters from Blender to the Unreal Engine
The tools, which have been in development for several months, are free and available for download.
Availability and system requirements
Send to Unreal and Unreal to Rigify are available under the Unreal Engine EULA. Both are free to download. The plugins are compatible with Blender 2.83+ and Unreal Engine 4.25+.