A common use case is to have one raw-file and one JPEG-file of each picture. Each picture-pair share the same name, but different file extensions (e.g. IMG_1234.JPG and IMG_1234.RAW). If you sort by name and browse through a directory like this you get to see each picture twice. It would be nice to be able to sort by file type to avoid this. The files within one type should be sorted by name, just like Doplphin. This feature would of course also respect if Dolphin sorts by type and do the same in gwenview. This workflow is possible on some other OS and it would be a nice addition to gwenview.
A possibly relevant merge request was started @ https://invent.kde.org/graphics/gwenview/-/merge_requests/284
A possibly relevant merge request was started @ https://invent.kde.org/graphics/gwenview/-/merge_requests/285