This isn't really an Issue. But, more of a Suggestion or somethin'.

And,

He's saying that there's an api for the Ultra Permissions Plugin made by TechCode, you could contact him he says. Like, i want Migration from Ultra Permissions to Luck Perms.

Duplicate of #1871Ignore me, BrainStone explains it better below

We've been over this many times See #1871 and #1643.

It boils down to the API not being publically available and the storage format being an unreadable mess which is nothing short of a miracle that it even works and doesn't take minutes to load per user.