After reading your last clarification, I tried just installing the Qt.io kit on my existing development VM without any change in the result. So I built a new Windows 10 system from scratch and ...

@thecodemonkey86 thanks to thecodemonkey86, I compile it in qt 6.6.1 successfully, this is my note.Hope can help you. By the way, i install mysql8 on my windows 11. Copy mysql lib path and head path ...