Hello.
The demo and the configurations for menus, pages, articles, modules, template styles, and other elements are part of the Quickstart, because all that data is stored in the database. This is how all Joomla template developers work, so simply installing the extensions won't recreate the demo that the Quickstart contains. Therefore, the only way to import the Quickstart data is to install the Quickstart separately, then export and import the template style you want to use, export and import the SP Page Builder pages you want to use, view the module and menu configurations, and recreate them on your existing site. To begin, you should analyze where most of the data you want to use is located. If it's in our demo, then install the Quickstart and import the data from your existing site into it. If most of the data you want to use is on your existing site, then you'll need to manually import only what you want to use from our demo (which I already explained at the beginning).
Regards.
