Other than a call to Canon, nothing else is up my sleeve. I don't have a macOS so I can't compare. Windows always worked. Maybe there is a draft print setting somewhere on the Apple device. I feel your pain.
Well, after playing with every setting as well as installing the Cannon iOS app (which did not help), it turned out to be that iOS has an issue using the "eco print" aka "toner saver" mode. I changed this setting in the printer, and now the iOS print...
I have the exact same issue. Our Windows 10/11 devices work fine.Two ipads and an iOS phone all print very faint. Is there a setting someplace for this?
