How to set up a roadwarrior config in OpenVPN, using "OpenVPN connect" for Android and iOS

I would just like to remind you that there are two editions/versions of the openvpn client available on openvpn.net.

  1. the “official” version - OpenVPN Connect (current version 3)
  2. the Community Edition version (current version 2.5.7)

These editions, differ in the way they are configured.
Differences in configuration, have been a source of trouble, reported and explained on the IPFire forum.

Will these differences in configuration be explained on some Wiki page?