> written records
> While it’s not incorrect to theorize that there is nothing because there was nothing, ...
There likely was something. Linguistic evidence from proto-indo-european homeland theories aside, could mean ongoing exchange and exploitation from far away, so no permanent civilization but excursions and outposts.
And if there was something, it is still possible that was removed by conquering religions.
Which city in Central Africa?
They could be referring to Benin City
History is full of stuff like that. The key difference is that these regions didn’t keep written track and have left only archeology, but in Europe most of that didn’t keep because other people lived on it after wards.
The earliest written accounts about Northern Europe are Christian accounts that were written almost 400 years after the Vikings discovered America. While it’s not incorrect to theorize that there is nothing because there was nothing, it’s important to keep in mind that we still don’t know how Stonehenge was build.