Sovereignty in Africa is a joke, the nation state concept shouldn’t have been applied there and the colonial work on imposing that is vestigial at best
And that’s the 99th percentile answer on that side of the bell curve
When people want to refer to a country on that continent, they do. There is little reason to refer to most countries on that continent because they are basically not separate administrative districts
Just fiefdoms that have nothing to do with the borders drawn and lots of area in between
They are not a uniform monolithic people, regardless of outside interference.