QQuick3D::idealSurfaceFormat should mention only used for OpenGL

https://doc.qt.io/qt-6/qquick3d.html#details

On this page, it mentions it needs to have 
QSurfaceFormat::setDefaultFormat(QQuick3D::idealSurfaceFormat(4));
for the extra OpenGL context initialization.

I suggest also mentioning clearly this has no effect when using other backends like Direct3D.

or add a link to https://doc.qt.io/qt-6/qtquick3d-requirements.html#opengl-specifics

I think having important information outside of the API introduction page but on a separate page is not good.

make users have a clear understanding of the use case when you need to put this in the main.cpp.

or maybe

#ifndef QT_NO_OPENGL
  QSurfaceFormat::setDefaultFormat(QQuick3D::idealSurfaceFormat(4));
#endif