How to show 'Angualar Schematic...' entry in project popup menu?

I have an angular project where the Angular menu items are missing.

In the settings it seems to be configured correctly:

But in the pop-up menu (from the project-view) the entries are missing:

Note: Some other projects work fine in the same IDE:

Is there maybe another setting that I am missing - or another way to make this work?

Notes:

• I have tries all IntelliJ repair options
• I copied the whole project, deleted all IntelliJ related files/dirs (*.iml, .idea, .run) and created a new project: still does not work

I just found out the this was caused by some nrwl/nx migration.
That migration converted the angular.json file to multiple project.json files: see nx-docs Configuration: project.json and nx.json

And now IntelliJ does not understand that this is an angular project anymore.