Fair.

I’m going off what I heard and what was said at the time by Jordan. Like the Forbes quickie (linked from the Wikipedia, I’m not some sort of weird bookmark crazy) https://www.forbes.com/2006/11/30/robert-jordan-illness-tech-media_cx_hc_books06_1201jordan.html

He said he was “getting out notes” and generally acknowledged the books weren’t done.

I won’t speak for Sanderson, but I seem to recall him saying Jordan provided an outline, notes for major events, and even some parts fleshed out and written in full (Rand in the cave comes to mind), but pulling all together was Sanderson.

It was absolutely a posthumous collaboration between the two.