I don't use a Canon with iPad. I assume that your printer is connected to the router by wifi and it has a good connection.
Does this help How to print using Apple Air Print.
Is the laptop connected to the router by cable?
Galaxy Note 8 vs iPhone X
The secrets of creating gory VFX
How to update iOS on iPhone or iPad
WhatsApp : comment lire vos messages sans que l’expéditeur le sache