Greetings,
Unfortunately, there are no Linux drivers available.
https://www.usa.canon.com/support/p/imageformula-r40-office-document-scanner#idReference%3Dsoftware-...
I haven't used Linux in a long while. 😀 SuSE, Redhat, CentOS and Ubuntu. The device would be fully supported under W11.
~Rick
Bay Area - CA
~R5 C (1.1.2.1), ~R50v (1.1.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
