Hello,
01, 02. This demo is using a custom layout for a single product page. Navigate to Layouts > Edit single product layout with the page builder that you are using.
Here, you can edit the specification and free shipping section and for the specification, choose the data source whose attributes you want to display: https://ibb.co/JwwrhcNM
These are product attributes that can be edited and configured for each product individually.
Here is our documentation on how to use Layouts in our theme: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/
03. Please share your Site WP-ADMIN Login details in the Private Content field so that we can check this concern on your Site and help you out accordingly.
Best Regards,