Agree with previous contributor on having the Latest and Greatest offering from Apple
Notation on above command
When this machine was running Ventura 13.3.1(a) ⬅️
The above command would execute but would Not List all the Full Version
Only once 13.4 was installed would it list them
If going back in versions, for some unknown reason, you would have to Create a Bootable Installer and then boot from it
Extra Special Notation regarding the Touch ID equipped Apple Computer.
About Startup Security Utility and Must Enable from Recovery Mode the ability to boot from External Drive Before Attempting
p.phillips@Ps-Mac-Mini-M1 ~ % softwareupdate --list-full-installers
Finding available software
Software Update found the following full installers:
* Title: macOS Ventura, Version: 13.4, Size: 11511926KiB, Build: 22F66,
* Title: macOS Ventura, Version: 13.3.1, Size: 11500559KiB, Build: 22E261,
* Title: macOS Ventura, Version: 13.3, Size: 11500012KiB, Build: 22E252,
* Title: macOS Ventura, Version: 13.2.1, Size: 12261711KiB, Build: 22D68,
* Title: macOS Ventura, Version: 13.1, Size: 11931164KiB, Build: 22C65,