Two-Factor Email has no menu entry, so I cannot use appinfo/info.xml’s “navigations” section to set an icon file name. I noticed that my app icon is recognized in “settings/apps” if I place/name it “img/app.svg”. There should be another way to explicitly set a custom name for the app icon shown to the user, or documentation that it has to be “app.svg”.
Even if my app had a menu and I would have set an icon file name, I could only set one. So this mechanism seems to lack support for dark/light theming. But since core apps seem to be able to set dark/light icons: How to do it (correctly, NC 25 theming)? Please advise/hint…I didn’t find how to do it.