I spoke with a great tech support person this morning, and he was fantastic! My Pixma tr7020 was not connected to my new iMac, nor and not in systems preferences to choose.
Nothing seems to work, and Apple Care tried for over an hour to help me and then finally gave up and said it appeared that tr 7020 canon was not compatible with Big Sur OS v. 11.0. And since I had v. 11.2.
So it might be a problem. Turns out no downloadable drivers are needed at all for OS Big Sur iMac. So then I called canon tech support and and whole problem boiled down to adding the WiFi User name to the printer then to just punch in the WiFi password onto the printers tiny screen.
The tech representative was a sweetheart and talked me right thru it all! He was very knowledgeable and excellent!
Location: Chambersburg, Pennsylvania