I'm surprised that this thread hasn't attracted any comments. Just in case you haven't heard about the African continent Internet exchange, here is a YouTube video about it.
https://www.youtube.com/watch?v=OOy7jwi0At8That looks like one of those videos people who don't understand the topic make only to get views.
What is being explained doesn't sound new either and it is not exactly "alternative" internet either. It sounds more like "Domestic Internet". A couple of developed countries have had that for a very long time. For example in Iran we built it decades ago and everything domestic runs on that which makes it cheaper as well.
It is basically a national security matter specially in this day and age that everything is depending more and more on the internet. Any country has to be able to have full control over its own internal traffic (eg. the banking system) to remain safe.
I've surfed the net for credible source(s) that validates the claim of Africa launching their own different internet protocol stack that doesn't work on Google's or American Server, but unfortunately I can't seem to find a reliable source, I'm an African and inasmuch as I'd like those claims to be true, I'm a afraid that's not entirely true.
What's actually happening is more of a push for digital sovereignty in Africa. More local data centres, subsea capbles, internet exchange points as well as policy coordination, in order to allow data to stay within the African locales. Smart Africa, in collaboration with the AU are actually the ones making this push. And for what it's worth, most of the bandwidth growth still comes from those Big Tech cables, like the Meta-backed 2Africa and Google's Equiano.