Not even close to being near that point, much less "beyond".
It simply can't happen (the flow to stop in any significant way) for the foreseeable future of 5-10 years. Trade will continue.
If all such trade was to stop not even now, but even a year from now, It would be Mad Max.
"Many countries in Africa" don't have the infrastructure, manpower, expertise, supply chain, and other factors - and they wont have for the foreseeable future.
If you're talking about sweatshops making clothes and stuff, sure. If you're talking about anything more advanced, that requires factories, technology, complex production lines, etc, nope.
For the foreseeable future, things will just get expensive and/or be consumed less.
You'd be lucky if you get "only modestly quite more expensive" alternatives.