You can build roads and infrastructure, create businesses and invest into education or have a supporting economy that does the same. China does many of these including their chat platform (Wechat) that enables a bunch of local businesses to be able to do what they want. I don't think that you can do too much more that that.

One example:

https://techcrunch.com/2018/11/28/simbapay-launches-kenya-to...