Comment 40 for bug 1951586

>Might want to reconsider that position given the latest release of 22.04 posted on 2023-02-17
>http://cdimage.ubuntu.com/ubuntu/releases/22.04/release/ubuntu-22.04.2-preinstalled-server-
>arm64+raspi.manifest contains netplan.io 0.105-0ubuntu2~22.04.1 which is offered by Imager as an
>install option.

Problem is you also still list Ubuntu 20.04 in your Imager repository file at: https://changelogs.ubuntu.com/raspi/os_list_imagingutility_ubuntu.json

Suggest you either toss any release that does not support 'regulatory-domain' from the repository first, or backport your fix to that as well.