Not exactly P2P, but I think the fibre optic drones used in Russia/Ukraine could be effective for regaining internet access in Africa.
Those drones have 10km+ fibre optic cables stringing out the back. Fly it to a different country, hook up to a friendly wifi/cellular network, then pipe your general purpose internet traffic through the fibre optic cable.
This wouldn't work everywhere. But for small Africa countries with lots of land borders it might work. Especially if the border area had jungle or other low traffic terrain.
Before wireless came to my rural area, we used to joke about how the phone companies ran dialup over barbed wire. "Internet's down; deer must have broken the barbed wire again."
Imagine having a mesh of hundreds of fibre optic cables strewn across the border.
Many having wireless routers at their terminus to forward traffic to other cables. Other cables having vertices and graph-like structures so that they could tolerate cuts in individual lines.
The end result could be something quite authentic to ARPANET.
Those drones have 10km+ fibre optic cables stringing out the back. Fly it to a different country, hook up to a friendly wifi/cellular network, then pipe your general purpose internet traffic through the fibre optic cable.
This wouldn't work everywhere. But for small Africa countries with lots of land borders it might work. Especially if the border area had jungle or other low traffic terrain.