Since Wireguard app for iPhone and Android support reading configuration from a QR code.
Would be nice to be able to write "show wireguard qr-code" or similar where the QR code with configuration for the mobile devices is shown for easy scan or quick export later on when/if a web-ui with api access is created.
Debian wiki describes how this is done on a debian server.
https://wiki.debian.org/Wireguard#A3._Import_by_reading_a_QR_code_.28most_secure_method.29