There's only 7 ground stations (or points of presence, I'm not sure what the difference is but they list them separately) or so in Africa, with Nigeria, Botswana, Mozambique, Rwanda, Kenya, Nigeria, South Africa being the ones that are known and confirmed.

Not many people live inside 15 miles of those stations, but Starlink is active in 23 countries.

The max steering angles of the phased arrays are much higher, the diameter is at least 10x what you say. And for the last few years, lasercoms can route traffic inside the constellation so a given sat doesn't need to be within sight of a ground station.