The Thrifted Joomla template's QuickStart package includes multiple, all built using the latest SP Page Builder Pro version. These pages can be customized using SP Page Builder Pro according to your preference.
To see these customizable pages SP Page Builder's dashboard contains the pages made with SP Page Builder Pro. Use SP Page Builder Pro's backend or front-end editor to edit or customize any page. To do that, from the Joomla dashboard, go to Components > SP Page Builder Pro > Pages and select the page you want to edit.