IT/Software/System Config/Network Printers
Seeing too many printers.
In KDE Avahi will look for printers as well as CUPS
CUPS supposedly builds a print queue and the Avahi distributes that.
There are a few changes that need to be made.
Change Cups-browsed.conf
Change that browsing so that is is only local.
Change avahi-daemon.conf so that you deny interfaces you don't want such as zerotier.