I laughed out loud when I read "e-government". The sad truth is countries like Zambia are just not equipped or capable of running anything "e". I am forced to use Zambia's Electronic Single Window (https://zesw.gov.zm/zesw/). What an absolute shambles, a total failure. If you don't know the right individuals in the right departments you're getting nowhere.
From my limited experience the problem is centuries of poor to no education and such an extreme level of poverty that individuals are constantly in survival mode. How can I make it through the next day/week/month vs. family, financial and career planning.
So, if we can wave a "give Africa what it needs" wand, I wouldn't suggest Startup Cities, Cryptocurrencies & E-Governments, rather good quality education, healthcare and just enough financial security to exit survival mode. If you can hand that to Zambia (without the corruption that is there now), you'd likely see a nation flourish and carve their own path to success, probably without "startup cities" too.
P.S. Zambia has Special Economic Zones: https://www.lsmfez.co.zm/. They're fine for large conglomerates who want to save a few kwacha in taxes but are mostly useless to all other small business owners.