Actually you have very handy shortcode generator if you turn on Visual mode instead of Text mode. To do that, please change page template to Normal Page Layout (except Landing Page Builder). Then choose Visual tab:
After you change to Visual mode, revert the page template to Landing Page Builder and Shortcode Generator should works on section builder.
Oh my bad, forget to tell you to save it first, gladly that you can resolved by yourself 🙂
Cool! go try it and make your page even better with VC, while we developed the official support for that plugin 🙂