From Tobias Fella: in cmake, the library is called KUserFeedbackQml-Qt6 while the qmldir file says it's KUserFeedback
Exact error is: "qrc:/kcm/kcm_feedback/main.qml" "Error loading QML file.\n12: module \"org.kde.userfeedback\" plugin \"KUserFeedbackQml\" not found\n"
Git commit d43b9ba62d942e950955c0094314d4224c262eb6 by Laurent Montel. Committed on 05/06/2023 at 14:26. Pushed by mlaurent into branch 'master'. In qt6 plugin name is KUserFeedbackQmlQt6 Test kcmshell6 kcm_feedback (now we can see it) M +3 -1 src/provider/qml/CMakeLists.txt D +0 -3 src/provider/qml/qmldir A +3 -0 src/provider/qml/qmldir.in https://invent.kde.org/libraries/kuserfeedback/-/commit/d43b9ba62d942e950955c0094314d4224c262eb6