GNU/Linux Ubuntu 22.04 Canon MAXIFY GX3020/GX3040/GX3050 Printer Setup Guide
How to Install Canon MAXIFY GX3020/GX3040/GX3050 Printer on Ubuntu 22.04 Jammy LTS GNU/Linux desktop – Step by step Tutorial.
And the Canon MAXIFY GX3020/GX3040/GX3050 Ubuntu Setup it’s quick and easy because it only involves running a few Basic Shell Commands.
Especially relevant: after the Driver Installation to achieve the Printer Setup follow guidance to Add Printer.
Finally, included in the guide you find also instructions to Quick Start with Canon Scanning on Ubuntu.

Canon MAXIFY GX3020/GX3040/GX3050 Printer Ubuntu Installation Guide