Africa as a continent isn’t and, in a foreseeable future, won’t be overpopulated. There is one billion people (it should be still below 1.4 billion in 2025) living in Africa whose area is 30 million squared kilometers. So the average population density is the same 30+ people as you may find in the U.S. – which is “like” one-third of Africa, both when it comes to the population and the territory.
To compare, the population density is 130+ in Czechia, 490+ in the Netherlands, and 7,700+ people per square kilometer in Singapore. (Monaco with 18,000+ and Macau with 20,000+ are too small to be taken seriously but Singapore has over 5 million people.)
The continuing relative poverty of Africa isn’t caused by overpopulation. It isn’t caused by the continent’s inability to provide the people with the resources. It is mostly due to the insufficient sophistication of their economies which is linked to poor education systems and perhaps their lower economic potential. But whatever the GDP or IQ or economic potential is, they are still people and should be sort of free.