Does archiso work for Artix to save a configuration to an ISO? Could I edit an exiting ISO and put what I want into it? I want the person who receives this ISO to be able to make their own user but with my configuration.
You should look into this: https://wiki.artixlinux.org/Main/InstallationUsingBuildiso
Meanwhile there are many more profiles than just lxqt.
If you want new users to have your configuration, you can create a "skel" folder in the /etc/ of your root-overlay inside the iso-profile of your choice. You can place your dot-files and dot-folders inside of skel. All inside the skel folder will be used for every user created while the installation or later on the running system.
I really must say, I never have got an easier and faster experience in creating a custom iso than on artix.