Windows/MinGW 9/Qt 6.2.3: Data types not displayed by GDB dumpers

When using \tests\manual\debugger\gui and breaking at the end of MainWindow::on_actionExtTypes_triggered() tests\manual\debugger\gui\mainwindow.cpp:325,
data types are displayed as inaccessible:

• QVariant(QString)
• QSet<QString>

	Lokale Variablen		
		stringSet	<unzugänglich>	QSet<QString>
			[0]		
		v1	<unzugänglich>	QVariant
		v2	<unzugänglich>	QVariant

Furthermore, when taking a "QWidget *w = this" (QMainWindow), w is not expandable as opposed to "this".

All of this works on Linux.