AirPrint problems are quite common among users. Use the following tips to resolve AirPrint not working issues on your iPhone.
Check whether your printer is supporting AirPrint. You can find that out through the manufacturer’s information.
Utilize your printer’s Wi-Fi setup, or you can also use a Wi-Fi wizard.
Check whether you have Bonjour setting enabled on your printer.
Ensure that your router supports the Bonjour packets.
Your printer and computer should be connected to a single Wi-Fi.
Switch off the Airplane Mode in the iPhone. Turn Bluetooth on.