Hello,
1) Provide us with WP Dashboard access to your site to check the demo content that you imported.
2) XStore studio is Elementor templates, it’s not available for the WPBakery if you use WPBakery version. If you use WPBakery page builder use Page importer option https://youtu.be/wkIKN2IyEZI to import content of these pages https://xstore.8theme.com/demos/2/eco-scooter/ https://xstore.8theme.com/demos/2/ecotransport/
Regards