This post assumes that you have installed the prerequisites - I can’t believe that your printer even actually works without having installed
capt-src (from AUR)
and then set it up.
You need that for this Canon printer to work.
I refer to this:
which links to this:
where it is described.
ps:
ahh, I see
You used this instead:
There is also an open source CAPT driver in early alpha stage not described here, available as captdriver-gitAUR.
… don’t - it’s early alpha, as they say
and I don’t know whether it even works or how to set it up/use it.