Please follow these steps.
Canon airprint printer not found.
After follow the above mentioned step and the problem still exists then it could be the last step to fix your problem.
Turn off your router and restart it.
Check the printer move directly to step two you have used airprint on your printer in the past and this error.
Use the left arrow to select device settings and press ok 4.
Use the down arrow to select lan settings and press ok 5.
Use the down arrow to select the wrench and screwdriver icon and press ok 3.
If none of these steps work then you should try the following steps in this order.
Confirm to delete the printer.
To ensure the setting is enabled please follow these steps.
Disconnect your printer as well as your device both from the network.
Connect your device with the network keeping the ssid of the router in mind.
Start your mac and re install the printer via system preferences printers add printer when you.
Please press the menu button on your pixma mx922 2.
If the setting is disabled you will not be able to print via apple airprint.
Use the down arrow to.
Check if your printer is connected to the network you need to make sure that your printer is connected to the same network as your device.
Fix no airprint printers found via software update solution 4.
I found this on a canon forum you will want to ensure that the bonjour setting on the printer is enabled.