I'm just digging in to Vectorworks with 2023 version and am in the exact same boat. I go to my 3D view and everything is wireframe. I can't event find the hardscape settings button in the right window pane where you were at so I'm even a step back from there. How do I find that menu? I also went to the Vectorworks University page and when I search for hardscape components it says nothing is available so I wonder if they removed that tutorial..