Epson SureColor P800 printer & Ubuntu 18.04.4 LTS

where did you search?

$ lpinfo --make-and-model “epson surecolor” -m
gutenprint.5.2://escp2-p400/expert Epson SureColor P400 - CUPS+Gutenprint v5.2.13
gutenprint.5.2://escp2-p600/expert Epson SureColor P600 - CUPS+Gutenprint v5.2.13
gutenprint.5.2://escp2-p800/expert Epson SureColor P800 - CUPS+Gutenprint v5.2.13

everywhere IPP Everywhere

were you interested in other troubleshooting options?