In the grand scheme, HIV/Aids has not had a large effect on population growth in Africa (and unlikely to have for the future as it is a mostly localised to southern parts of Africa and has been coming down rapidly).

Most forecast say population will peak at 10bn to 11bn - https://ourworldindata.org/future-population-growth

- A big part of this increase in indeed from Africa which is expected to increase by 3bn - from 1.3bn in 2020 to 4.3bn in 2100

- The largest uncertainty is also about Africa where faster economic growth is expected to bring down population growth (counter-intuitively).