Ethiopia probably have cheap electricity as well because it's situated in the
Nile basin. I did some research, and they have quite a number of hydroelectric power plants -
https://www.gem.wiki/Category:Hydroelectric_power_plants_in_Ethiopiain the article, they say
“100% of the data center’s electricity comes from renewable energy sources, specifically from the Grand Ethiopian Renaissance Dam, the largest hydropower project in Africa, with a capacity of 5.15 GW,”
That dam is not 100% built yet so it's only going to yield a fraction of the electricity that the article cited.