Hello,
1) What issue did you face while trying to import demo content using a one-click installation?
2) Could you provide us with WP Dashboard access, please? We’ll check the problem with the demo content installation. Tell me do you want to use Elementor or WPBakery as the main page builder?
3) You can’t import demo content via FTP. It does not work this way. Demo content could be imported only using WP Import tool. Provide us with WP Dashboard access first to check the 1) issue before we provide XML files to you.
Rgards
Regards