South, East and West Africa still have massive issues with providing one of the most transformative technologies ever, to their populations, particularly in rural areas.
Average rural electrification rate across Africa is 29%, with places like Zambia at only 11%. https://www.usaid.gov/powerafrica/zambia
Access to electricity obviously has impact across many aspects of life, but for many of the people I have spoken with, their immediate priority is improving their kids education. If you don't have electricity you can't study after dark.
This particuarly impacts girls, who not only don't get the light to study after dark like the boys, they are also responsible for collecting firewood, which is used to get even a little (crappy) light.
So after a day at school, the girls go out to collect additional firewood to create light, then are obvisouly exahsted, don't have very good light to study and fall behind in school.
That's just at the bottom of the ladder. All the way up industry, they are all impacted by poor electircity supplies.
In my opinion, it's a transformational area to be working in.