Well,instead the old Retarget Manager,UE5 use a new method called IK Retarget (which I’m using now) to retarget animation.This method requests both origin and target skeleton to create responding IK Rig asset.(UE5’S new retargeting solution
The IK Retarget editor window do have edit pose option,where I can adjust target skeleton to match base skeleton just like the old way,but as I mentioned before, to precisely match up different skeleton type is very time-consuming and the result are not so that precisely （especially the finger part）.
So if there has a tool to quickly match up base and target skeleton in IK Retargeter editor window that will be very helpful.