This source is a short summary of key Hebrewisms in Africa by the reputable scholar Godfrey Higgins. Godfrey Higgins makes a quick reference to the tribe of Juda possibly migrating to West Africa like Guinea. Godfrey Higgins mentions Edrisi mentioning Jews being in the area of Lamlem which others have noted and the Ashantee country is mentioned. This source also mentions Canaanites fleeing into Africa which other sources have noted, as well.
There are a variety of reasons as to why certain tribes in West Africa don’t have a Pentateuch yet they still practice the customs. One of them is that not everyone in ancient Israel had a Pentateuch which is why the law had to be read out loud.