Data is nice. I lived in West Africa for nearly a decade total, up until 18 months ago, working on economic devlopment. The data is notoriously bad, and you're comparing apples and camels.
Look, we have in common that we want to see greater African agency and less European colonialism of any sort (or Chinese for that matter).
That being said, I have seen dozens of examples of greed and corruption being the driving force behind nationalization. Often with only the short-sighted goal of raiding capital investment accounts and giving friends jobs. And nearly every time leading to costly failure. Decades of exampes, from Idi Amin to Zambia to South Africa to Mali to DRC to Tanzania to Niger to Ghana, across every possible industry, show that the only only only result from nationalizing something is killing it, and killing it stupidly. Down to things like water desalination plants, power distribution companies, or telecom companies. Maybe you can find a few that are barely solvent across a continent of 54 counties and 1 billion people. The rule is that it's always a play to line pockets and buy a flat on London or Paris and horde wealth for yourself.
And keep in mind that nationalizing something is eliminant domain of stuff. It's theft with a sorry card. Not for some greater good, to make someone else rich, not the first guy.
The result is my daily experience anywhere other than SA, Morocco, and Kenya: the power goes out for hours at a time most days, water comes from a truck and maaaaybe on Mondays or Tuesdays from the city, and mobile phone and internet only works from private companies like MTN or Vodaphone. Often that buy out the old, failing government telco for the license and have to pay hundreds of ghost workers that were promised jobs by a president way back when.
You should note that one of the wealthiest counties per capita in SSA, is Botswana. Which is basically a podunk AF suburb of Pretoria/Joburg anyway. But they never nationalized their diamond mines, and their population is relatively better off. Riddle me this - why has Botswana been the success story with a PPP while all these places with nationalized everything struggle to literally keep the lights on?
Which is not to excuse the bad parts of the system. I once spent a couple years living in a rural village of about 400 people in Niger, and we had a brackish well. A few people wondered of it might be oil. Clearly, it's not. But all I could was warn them they should hope is not oil, and the dangers of being near extractive industry. Mines are more often than not, a blight on the earth.
It's the Web 2.0 model of corralling people into walled garden platforms, where they're driven insane. One day people will look back at this time and wonder what we were thinking.