The date and calendar feature on this page is an example of additional functionality. To add this to your theme, you will need to purchase a premium plugin. The booking and calendar plugin is NOT built-in to the theme. Instead you can purchase this plugin from a third party. We added this as an example to show the ability to book via date and calendar. You can purchase the premium plugin here and add it to your theme:
Woocommerce Booking & Appointment Plugin
Note: All other features shown in the live preview are built-in. The date and calendar functionality is the only additional feature.