This is fantasy boy character . There's no additional bone. don't need to Retargeting Animation.
Worked with Advanced Locomotion System.
Worked with UE 4.24 and above.
ALS Video Preview :
Rigged to Epic skeleton: (Yes)
If rigged to the Epic skeleton, IK bones are included: (Yes)
Vertex counts of characters : 38,516 Tris
Number of Materials and Material Instances: 12
Number of Textures: 17
Texture Resolutions: 2048
• NOT RECOMENDED FOR UNREAL 5 - If you still want to do it, Make Sure Change all of the Translation Retargeting option to "Animation Relative" (Right Click the Pelvis Translation Retargeting and then click "Recursively Set Translation to Retargeting AnimationRelative")