Printers are not showing up in the print dialogue in gimp!
Gimp was installed using "snap", e.g.
$ sudo snap install gimp ... $ sudo snap list Name Version Rev Tracking Publisher Notes ... gimp 2.10.8 101 edge snapcrafters - ...
Two things need to be done, update to the --edge version, and make it use cups.
$ sudo snap refresh gimp --edge $ sudo snap connect gimp:cups-control