some printers which support one printing a test page by clicking on the printer itself, if that is the case and that do not print then it has nothing to do with the computer, that would print even if no computer was connected
for a printer to work the printer maker has to make a driver for the operating system (this is not something apple or microsoft or the likes do, they just include some drivers provides by the hardware manfuactors)
PIXMA MP480 - Support - Download drivers, software and manuals - Canon Europe
show that the newest macOS canon supported was macOS 10.10 yosemite released in 2014
the thing is that canon do not get any revenue by spending a lot of r&d on keep releasing new drivers and test them every year (in case of macOS) for old printer models they don't sell any more.
you can try your luck to see if the free gutenprint drivers support that model
Gutenprint Supported Printers
otherwise you may wish to look for a new printer
and or keep an older computer around to handle the printing