I wrote a post about a month ago about demographics of the sub, which I think is relevant to your question.

In brief, no, there has been a great deal of academic scholarship on African topics, and there is literature out there that addresses the questions that have been asked (or explain why the questions come out of mistaken assumptions).

The low rate of response is because there are only five africa flairs who are active, down from 9 or 10 a year or two ago. Of those five, two are specifically Egyptianists, so sub-saharan Africa may be outside of their expertise.

Of course, that isn't to say that only flairs can have any knowledge about the African past. There might be people out there who don't have flair yet who can provide excellent answers that cite specialist literature. But, so far that has been fairly rare. Fewer redditors get deeply interested in African history than WW2 military history, for example.