If any kind of ma to skl file conversion is possible, it is most likely related to the export of skeleton data from Autodesk Maya scene files. We have not found any particular mentions about this on the Internet, so it may be something very rare or very specific. But it's probably done with individual part of the scene and not from the whole scene.
As always, when dealing with very technical things, it may be best to reach out to the Maya online community for assistance.
Updated: February 14, 2024