The Open Camera repostory now includes the icon as fastlane metadata. Testing today, I can see the icon in F-Droid, both on the web and in the application. So hopefully it's fixed!
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Thanks for the info, I can reproduce this too, both in F-Droid itself, and on the web: https://f-droid.org/en/packages/net.sourceforge.opencamera/ .
I note that I'm not doing any of the things mentioned at https://f-droid.org/en/docs/All_About_Descriptions_Graphics_and_Screenshots/ , although then again this used to work (presumably picking it up from the icon in the repository), so it's unclear why it's stopped working. But I'll add a note to do what's recommended in that link anyway.
See also https://gitlab.com/fdroid/fdroiddata/-/issues/2772
The Open Camera repostory now includes the icon as fastlane metadata. Testing today, I can see the icon in F-Droid, both on the web and in the application. So hopefully it's fixed!