Skeletal Skinning with Optimized Centers of Rotation. (Oh, No!, again...)

I have to apologize: I have never understood Unreal or Unity. It's not my business to make video games.
Although I already made a post about this here, yesterday I found a solution for Unity, which I don't know how it works...
My question is if it works only for rendering or can it be applied to an Fbx or Alembic export, since it seems to be a geometry or Weight Maps problem.
https://forum.unity.com/threads/cor-real-time-skeletal-skinning-with-optimized-centers-of-rotation.634435/