They'd probably have to do quite a bit of manual labor on the things without significant cooperation from the bikesharing companies, given that all of them are

They'd probably have to do quite a bit of manual labor on the things without significant cooperation from the bikesharing companies, given that all of them are equipped with locks attached to the frames that can only be unlocked with the ridesharing companies' apps; and many need significant maintenance, if you've ridden these a number of them probably don't really have properly functioning brakes or messed up chains and stuff. Not to mention any brand impact that would have on these bikesharing companies. All surmountable but would stand in the way of making it a slam dunk. That and it's not like Africa is the only impoverished place these can be helpful in. Parts of China itself, as well as many of its neighbors, are in equally perilous status economically. The feeling I get is that the central Chinese government really wants bike sharing to succeed since it has the potential to relatively cheaply solve so many problems, from last mile transit (at least for the able-bodied) to reducing car dependence, but local Chinese governments got saddled with dealing with the chaos of it all.