Nice tutorial indeed and am able to follow the instructions.
Any known caveats potentially to be observed for the latest release of the UbuntuMate 22.04.1 LTS Jammy Jellyfish for Raspberry Pi released recently?
More specifically, I like to have this latest release running on Raspberry Pi 3 Model B device taking into account the guidelines given with the article "Activating USB boot for UbuntuMate 20.04 LTS".