Is there any way to link my iPhone 13 to my cannon mx340 printer??

Hi,

Unfortunately, the Canon PIXMA MX340 is not a supported AirPrint model.

About AirPrint - Apple Support

However, the MX series is mentioned in https://apps.apple.com/us/app/canon-print-inkjet-selphy/id664425773, so you could perhaps check whether the Canon PRINT Inkjet/SELPHY app for iOS would work with your printer.

As long as your printer supports AirPrint, you can print to it.