What printers can I add?
Your device prints over the network to printers that support IPP, including IPP Everywhere and AirPrint printers. No printer driver is needed.
Make sure your printer is turned on and that it and your device are on the same network.
To print a picture, open it in the Photos & Videos app and tap the print button (learn how). Photos & Videos is the only app that prints.
Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.