Need to upgrade scanner (Canon 5600F) software for macOS12.6.8

I don't see anything suggesting that the scanner supports AirPrint. Canon's most recent drivers are for Mojave – and there's a message on the Canon site saying that they no longer support the scanner any more.

https://www.usa.canon.com/support/p/canoscan-5600f

About AirPrint - Apple Support

There's a third-party product called VueScan that you might want to look into:

https://www.hamrick.com/

https://www.hamrick.com/vuescan/canon_5600f.html

👍+1

Vuescan is a super app. I have used it for many years with both film & flatbed scanners.

And it supports the Canon 5600F without needing any Canon drivers.

Another vote for VueScan, has worked for dozens of different Scanners for a decade or two.