The icon for network print is missing and revert to symbolic.
In gnome-settings :

And CUPS panel :

By the way emblems wrong too (issue ?).
An icon proposal :

Looks really good. A PR would be welcomed, if @ubuntujaggers agrees
Great! You can maybe use the same colors as on this icon:

@friendlyapple In fact... I copied the cable from the folder-remote icon !
@friendlyapple and @Jupiter007-43
Do your icons contain clip and mask?
@gusbemacbe Yes it contain some clipPath. Why ?
Ah, because #1889.
Ok, but I doesn't remove them because printer.svg, which is based on, has too.
The branch for the lighter folders actually has a change to the greys on the network cable element... the original grey + purple folders still had the old warmer greys as an oversight, I've corrected that in the latest branch.
Off topic, but where can I report that (add printer in gnome-settings) :

Gnome-settings or Gtk gitlab?
I'd try first the repository of the app
Ok, thanks!
Most helpful comment
An icon proposal :