Scanner

Hi, welcome to the Apple Users Community.

Please try this link for help with your issue

Canon Drivers Download

The page will detect your OS and should guide you to the links you need if they are available.

Best of luck

Not possible, unfortunately.

There are no drivers listed for the LiDE 400 in Canons website

However try Viewscan, there is a free trial available to test your scanner

https://hk.canon/en/support/0200553304

Above is a link to software from the Canon Hong-Kong site which apparently contains drivers for Catalina and prior OS versions.

Hope this helps.