Yes, definitely, but these remain speculative. As you know, we are talking about real-time research. The data, to which many people have access just about everywhere, report low mortality and hospitalization rates. The data on mortality are particularly interesting.
The explanations vary, however. Some suggest environmental issues that may be climate-related. A similar phenomenon was observed here in Canada. Things were different in summer than they were in winter, for example. Other factors may be tied to natural immunity and certain populations, though this remains to be determined. Such immunity may also be related to vaccines or treatments previously received for other diseases. Many countries of the south have experienced other pandemics. There was widespread vaccination of these populations and they may have developed a resistance to this type of coronavirus.
Some issues are essentially related to community or culture. There are far fewer contacts between people in rural areas than in urban communities. This is also true of Canada. I don't want to make broad generalizations, but much of Africa is rural. In the big cities, the epidemic may be somewhat more pronounced. But the fact remains that mortality is lower. Age category is another important factor. As we know, older populations are more seriously affected by this disease. The age curves in the south show that generally speaking, their populations are much younger than in Western countries.
Those are the explanatory factors that remain to be identified and confirmed as time goes by, once the science has got there.