Once the theme is imported and installed, you need to customize by adding your own elements.
Go back to your WordPress Dashboard > Appearance > Customize > and then add your own color palette, fonts, logo, menu, header, footer etc.
Note: my single pages (and consequently also all my block templates) are built following the default “Full Width” mode.
If you want to change the desired settings, select the option of the pages and blogs you want and click on “Publish”.
If you want to add a sidebar to your pages, just configure it by going to:
WordPress Dashboard > Appearance> Widgets.