In this tutorial, we’ll walk you through the process of importing a character from AccuRig into Unreal Engine 5.6 and retargeting animations to that character. This is a useful technique for integrating custom characters into Unreal Engine games or animation projects, especially when you’re working with motion capture data or using pre-existing animations from other characters.
We’ll go step-by-step through the process, from exporting your character from AccuRig to Unreal Engine, and then applying motion animations from an existing Unreal Engine skeleton to your custom character.
https://dev.epicgames.com/community/learning/tutorials/qB1Y/tutorial-importing-a-character-from-accurig-into-unreal-engine-5-6-and-retargeting-animation