Here is the solution you are looking for: https://support.plex.tv/articles/200890058-authentication-for-local-network-access/
Basically you can add IPs (such as your local domain) to bypass authentication. The only caveat is that you must be online when you set this. IE: You can't do it during an outage.
From what I understand, the KDE team used to use OpenSUSE as their distro of choice when testing KDE. This has changed now to KDE Neon being the flagship KDE experience. Also OpenSUSE will install Nvidia Drivers during install if you select that option. You'll have to enable the Nvidia repo later on too. But it's dead simple. Definitely give OpenSUSE a try. I've been using for a few months now on my laptop and it's fantastic. It just works, including BTRFS snapshotting, right out of the box.