And, globally, the cash from selling fossil fuels won't be entirely replaced by cash from selling critical minerals / hydrogen, in a NZ2050 scenario
— I'm @Ketanjoshi.co on Bluesky (@KetanJ0) November 11, 2021
Which is fine: because being alive and healthy on Earth is more important than cash imo pic.twitter.com/iDCOSv1zUt

You could probably avoid all these engineering summersaults by giving the Congo more access to fossil fuels so they could mechanize their mining processes.
Considering the recent history of the DRC, it would probably be shunted to the military and/or the local gangs controlling the slaves.