qsl *install sane-backends from the repo.
*we have the canon ufrii's but those are not scan drivers.
*Many are saying for that model find the pixma-backed package and that will work. Not in repo that I can see.
*I'm also seeing sane-backends works but I don't know all you can do it try.
*to get the scanner seen at least I would install Gsan2pdf the ugliest scan program I've ever used. it see's everything. I've seen repo scanners not detect stuff.
spitballing. where there's a will there's a way with scanners and solus and linux in general. If it takes 4 or 5 days to figure it out it still beats windows 🙂