Cannot remove window min/max buttons Ubuntu Wayland

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.resize(250, 150);
 
    // Remove minimize maximize button works on Windows 10 / Ubuntu X11, not Ubuntu Wayland:
    w.setWindowFlags(w.windowFlags() & Qt::CustomizeWindowHint);
    w.setWindowFlags(w.windowFlags() & ~Qt::WindowMinMaxButtonsHint);

    w.show();
    return a.exec();
}