

only in Africa (see the answer in AskHistorians)
While my answer was related to Africa, as that’s where I’m most familiar with a paucity of study and an excess of material, I’d bet even money that there are plenty of other non-European (and outside of the Americas) collections that have yet to be fully catalogued, especially in the Islamic World and India. I just couldn’t swear to it or name any regions in particular to look into.
Inshallah!