I studied the last six years of visas. I did this from 2016 to 2018 and 2019 to 2021. It showed that the francophone Africa visa rate went from 29.5% to 26.6% during this time, after the IRCC adopted this, and the rest of Africa went from 26% to 25%. Francophone countries during the last three years compared with the three years prior grew 64% in terms of the total number of applicants. The rest of Africa grew only 32%. Both of them are better than when you look at the total world data.
I'm a technologist. I'm not a politician. The data doesn't suggest any discrimination against francophone Africa versus other African countries. In fact, if you want to find it in terms of other countries, you should look at the Middle East. Their visa rates really came down and their growth is really lagging, even though in Middle Eastern countries their development and GDP growth are going up.
I didn't find any particular data about francophone versus the rest of Africa that can say there's discrimination. That being said, a 26% visa rate is very bad.