Jim,
I went back down the Rabbit Hole. Here's an article on the fate of the Mamluks in Sudan. Pretty well got whittled away over the years. Fought local tribes. Apparently didn't develop a polity. Some returned to Egypt for pardons, some were killed and others pardoned.
A. E. Robinson, 'The Mamelukes In The Sudan', Sudan Notes and Records, Vol. 5 No. 2 1922, pp.88-94
Link:
https://www.sudanmemory.org/image/SN.../#topDocAnchor
Best,
Ed