qmlDebug(), qmlInfo(), qmlWarning() - where is qmlCritical(), qmlFatal()?

I'm logging messages from C++ code for QObjects that have been instantiated from QML, using qmlDebug(), qmlInfo(), and qmlWarning().

Now I need qmlCritical() and qmlFatal() as well, but find that they don't exist. Why?

Second, I notice that the "QtQml Namespace" page documenting these functions has disappeared in Qt 6 - the last available version is 5.15. Are these functions deprecated? If so, what could I use instead to get QML context for logging from C++?

Cheers