Run cUpsctl WebInterface=yes.
Open localhost:631. (May need to disable Cloudflare WARP.)
Go to Administration.
Select Add Printer.
Ente username and password.
Choose LPD/LPR Host or Printer and Continue.
Set Connection to file:/dev/null and Continue.
Set Name, Description and Location to something silly, select Share This Printer, and Continue.
Choose Make ‘Generic’ and Continue.
Choose Model ‘Generic PostScript Printer (en)’ and Add Printer.
Set Media Size to ‘A4’ and Set Default Options.