C++ CadCam program development with CodeBlocks instead of QT

It changed from this
doc.qt.io/qt-5/qglwidget.html

to this

doc.qt.io/qt-6/qopenglwidget.html

I have Qt installed and all the dependencies compiled. The opencascade documents crashed so there is nothing of that.
The project compiles and runs well.

So if we can PM so I can get some pointers from you it will be great.
my WA is plus two seven eight two six nine eight three two five one.