here:

qwindowkit/src/core/contexts/win32windowcontext.cpp:2030:78: error: 'Direct3DSurface' is not a member of 'QSurface'
2030 | if (m_windowHandle && m_windowHandle->surfaceType() == QSurface::Direct3DSurface

Actually QSurface::Direct3DSurface was introduced in 6.1 upward
(a CI build script must be contributed for ease)