score:6
It’s not so much that a travel history to African nations is not recognised, it’s more that it probably won’t be given the same weight as a travel history that includes countries with equivalent standing to Canada eg USA, Schengen zone, UK, Australia.
Travel history is only one risk factor typically considered by Immigration officials when assessing a visa application. The graphic in this question Schengen visa refused from German embassy shows how a visa application might be risk-assessed in general, irrespective of the country to which you’re applying.