In this tutorial, you’ll learn how to:
• Set up an IK Rig for a custom character
• Create and configure Retarget Chains
• Set the Retarget Root
• Create an IK Retargeter between different skeletons
• Configure and fine-tune Retarget Poses
• Retarget ALS animations to a custom character in real time
• Create an Animation Blueprint using the IK Retargeter
• Use Leader Pose Component to synchronize character parts
• Integrate a customizable character with the ALS Community Version
• Reparent a custom character to the ALS Character Blueprint
https://dev.epicgames.com/community/learning/tutorials/qnE7/unreal-engine-integrate-custom-character-to-als-community-version