Currently, Dolphin doesn't show thumbnails for .arw (Type: Sony ARW raw image; Content: TIFF image) files which makes it very hard to use for image stuff.
I suspect the problem here is that the detected mimetype (TIFF) doesn't match the extension. We used to have the same issue in Gwenview. See Bug 441698.
Git commit eefb8146d360879e85c5136401303a99d7b0c845 by Méven Car, on behalf of Mirco Miranda. Committed on 13/08/2022 at 07:56. Pushed by meven into branch 'master'. Camera RAW images plugin Plugin to read RAW camera images based on LibRAW. - Support to LibRaw 0.20 and 0.21-Beta - Support to multi-shot images: use imageCount(), jumpToImage() to select the wanted shot - Tuned to generates 16-bits sRGB images using camera white balance and interpolation AHD - Should fix CCBUG: 454208: on my Debian with KF5.96 and the pulgin installed, I see the preview of all my RAW files (ARW included) in Dolphin M +8 -1 CMakeLists.txt M +1 -0 README.md M +6 -0 autotests/CMakeLists.txt A +901 -0 autotests/read/raw/RAW_KODAK_C330_FORMAT_NONE_YRGB.RAW A +- -- autotests/read/raw/RAW_KODAK_C330_FORMAT_NONE_YRGB.png M +3 -1 autotests/readtest.cpp A +87 -0 cmake/find-modules/FindLibRaw.cmake M +9 -0 src/imageformats/CMakeLists.txt A +526 -0 src/imageformats/raw.cpp [License: LGPL(v2.0+)] A +7 -0 src/imageformats/raw.desktop A +40 -0 src/imageformats/raw.json A +48 -0 src/imageformats/raw_p.h [License: LGPL(v2.0+)] https://invent.kde.org/frameworks/kimageformats/commit/eefb8146d360879e85c5136401303a99d7b0c845