SUMMARY KDE Neon currently only offers the Qt6 version of the Oxygen application style through the misleadingly named kde-style-oxygen-qt5 package. Since only Oxygen Qt6 is available, all Qt5 applications (meaning the vast majority of applications) use Breeze instead. I was able to build and install Oxygen from Invent to get Qt5 support back. STEPS TO REPRODUCE 1. Install kde-style-oxygen-qt5 2. Select the Oxygen application style in System Settings 3. Launch any Qt5 application (like Okular) OBSERVED RESULT The application is themed using Breeze widgets. EXPECTED RESULT The application should be themed using Oxygen widgets. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE neon Unstable Edition KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.240.0 Qt Version: 6.5.1
I mentioned being able to fix this by building and installing from Invent, but it turns out that broke Qt6 applications, so nevermind that part.
Confirmed. On my to-do list.
fixed a loonngg time ago. qt5 support is built and bundled as a required dep of the qt6 version