It is an MG 7520, Ser. # ADPE00922. When I attach an MS computer to the wifi the Canon scans just fine. So it appears that Sequoia changed something that the Canon can't deal with. Sounds like a software issue. Canon is currently running 4.030.
I connected an MS computer to my Wi-Fi and was able to scan using the printer/scanner without a problem. Therefore it would appear that the problem is with the Mac with Sequoia communicating with the printer. I assume Canon will need to adjust their ...