Even following the minimum installation instructions (JupyterLab > 3, ipywidgets > 7), a Vbox with

• radiobutton
• graph
• table

only shows a radiobutton. Apparently Jupyterlab-widgets is installed automatically in a higher version than allowed.
Jupyterlab-widgets 3.0.3 does not work
Jupyterlab-widgets 1.1.0 properly shows all components in the Vbox as intended. So somewhere along the line it lost compatibility.