In certain cases, windeployqt can fail to pull in QtQuick even though there are QML dependencies on it

A pure QML app's main.cpp often looks like this:

#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine("main.qml");

    return app.exec();
}

In this case, QtQuick is not linked directly. However, the QML scanner will still run, possibly pulling in plugins which do link to QtQuick. Those plugins won't be able to load, so perhaps a dependency check should be done on them as well.