This is a bit technical, and probably only for passionate software developers!
We took some time to write a first version of a generic guide to porting /e/ OS to potentially any smartphone.
It gives an overview of the Android stack, how to build from sources, and some guidelines to bring an unsupported device to an /e/ life.
This document is not fully complete, it lacks some “real examples” for instance, so it will be a work in progress. Therefore we are posting the source document to our /e/-Gitlab to make contributions easier. Any people with an account on our gitlab instance will be able to improve the document (we just need to authorize him after a request).
We hope that it will help to bring still more people to contribute, by porting /e/OS to interesting devices, since our core team cannot handle any existing smartphone!
It starts from this URL, and the summary is on the right column!