Hi
Seems you want a preload image? This is how it’s done on for example the RPi aarch64 image, write to USB device, boot, answer a few questions and walk away for a few and come back to a login prompt or desktop…
If this is what you mean the Studio Express is what your after… create your own with desired packages etc… can make it a complete setup with users and passwords already set etc… https://studioexpress.opensuse.org/