PRINTER DRIVER LIST MISSING FROM MACBOOK PRO
I have been printing on a Canon Pixma MG3650S via Wifi using my Macbook Pro for a couple of years. It recently stopped printing and after checking all the obvious things, I uninstalled and reinstalled the printer and then the Macbook couldn't find the printer at all. I tried uninstalling and reinstalling a couple of times and then contacted Canon. I spoke to a few people there and then spent an hour on the phone with a technical guy. After again, trying all the obvious things (resetting the printing system, checking the Macbook and printer are connected to the same router, trying to connect via USB, confirming that everything is configured correctly and seeing that the Canon Utility folder is still visible in the Applications), he concluded that there was nothing wrong with the printer but that my Macbook has somehow lost the Printer Driver List and I can't load the printer driver because it's not seeing the printer list. He also said that Airprint is not working. He suggested I contact Apple as I may need to restore the OS (I'm currently using Catalina 10.15.7). He said there is no point in buying a new printer as my Macbook won't currently find any of them. Any ideas anyone please and if you agree I need to restore the OS, how do I go about this safely? Thank you for any help in advance.
MacBook Pro 15″, macOS 10.15