the Samsung CJX1050W printer is not available in the list of printers and there are no official linux drivers on the samsung homepage. however it is actually just a rebranded Kodak ESP C310 which is available in the list. i found this information here and my printer works now: https://club.computerwissen.de/qa/samsung-drucker-cjx-1050w-mit-ubuntu-installieren
This is an issue with whatever project provides the PPD for the Kodak ESP C310 (likely Gutenprint). This is not an issue with system-config-printer, which is just the interface.
the Samsung CJX1050W printer is not available in the list of printers and there are no official linux drivers on the samsung homepage. however it is actually just a rebranded Kodak ESP C310 which is available in the list. i found this information here and my printer works now: https://club.computerwissen.de/qa/samsung-drucker-cjx-1050w-mit-ubuntu-installieren
please add this information to the application