Is there a GUI for configuring VNC server?

A standalone app, or a settings panel? I’ve found a few instructions for configuring it through the command line but I prefer a GUI where I can easily see the settings without having to remember some commands I only use once every few years (also people seem to be struggling, as I am, to get it working through the CLI).

what desktop, there’s usually 1 installed already.

KDE Plasma. Maybe there is one and I’m just being an idiot!

type vnc in the search

Yeah, all it finds is a viewer and a server browser, nothing for configuring a local server.

try remmina, you might have to install add ons.
use the add/remove software so it asks if you want.

It sounds like that’s just a client, not a server?

the server is the listen option in the dropdown.