Just to put things into perspective:
- https://billionaires.africa/2022/05/24/5-multimillionaires-from-sudan-youve-never-heard-of/
- https://www.newsweek.com/im-donald-trump-south-sudan-war-salva-kiir-644234
- https://en.m.wikipedia.org/wiki/List_of_states_of_South_Sudan_by_Human_Development_Index
- GINI index for South Sudan 44.1, vs USA 39.8 - https://en.m.wikipedia.org/wiki/List_of_countries_by_income_equality
Bottom line, can't automatically assume that someone from South Sudan, isn't richer, better educated, more experienced, or whatever in this day and age (¹). I bet you can find a bunch of "mid class" people with an interest in FOSS in the capital.
PS: once upon a time, I ended up in an FPS game with a kid from the middle east, who after some casual conversation, and some Googling, turned out to likely be the second son of the prince's nephew... and it wasn't a scam, just a kid who wanted to play a game.
(¹: this was the goal of all who contributed to the popularization of Internet access, and it's nice to see it working)