Need network management on login screen, not sure where to even file the issue

So KDE uses SDDM as the recommended login screen. SDDM is nice, much nicer than GDM which does allow network management on the login screen.

The business I'm involved in needs to be able to manage the network before the user logs in, because we use the network to check if the user can log in using LDAP and pam.

The official SDDM github makes it clear they're not interested in this feature and consider it out of scope, and imply it's something an SDDM theme implementer could add. I'm not so sure, but I'd like to be able to avoid using GDM if at all possible.

Where can I file a feature request for this with any chance of it actually being looked at and implemented? If I was to work on this feature myself, what code base would I use? Would this be a modification to SDDM itself, or is there a KDE repo containing a theme I could look at as a start?