I wanted to try to inherit a Qt widget from QOpenGLWidget instead of QWidget. To do this, I:

• Replaced class MyWidget : public QWidget by class MyWidget : public QOpenGLWidget.
• Added #include <QOpenGLWidget>.
• Changed CMakeLists.txt by adding OpenGLWidgets to find_package and adding Qt6::OpenGLWidgets to target_link_libraries.
• Ensured libqt6opengl6-dev is installed.

When running make, the following error is displayed:

Visualization.h:10:10: fatal error: QOpenGLWidget: No such file or directory
   10 | #include <QOpenGLWidget>
      |          ^~~~~~~~~~~~~~~
compilation terminated.

What else do I need to do to make QOpenGLWidget available?