Not sure, if it is the same issue, but I observed something similar with a Canon SnapScan in combo with any scanning software managed via home-manager on a host running Archlinux, see simple-scan: Scanner is not detected anymore on non-NixOS system that has sane set up · Issue #271989 · NixOS/nixpkgs · GitHub
Not only seems simple-scan not to work but any software using the sane backend i. e. libreoffice or gscan2pdf. On my side I also only recently observed this but cannot tell for sure since when it stopped working. Following nixos-23.11.
On the machine where I use NixOS (sane.enable = true;) following nixos-23.11 the issue does not occur.
EDIT: My last sentence is not entirely true as I had to indeed switch to the module version of 22.11 for the module in question to work, have a peek here if interested in the hack.