Actually, when we inspected the site URL you have provided we got ‘see you soon’ message as shown in screenshot below. So, we are unable to inspect the site.
Also, you cannot edit the itinerary page as this page has been provided by WP Travel Plugin. You can add sidebar for widget in itinerary page but cannot edit this page.
Further, the feature regarding adding search bar block through elementor is not available for now. However, the feature to add block to display the trip using elementor is available currently. So, we will note it as feature request and will work on it.
If you have any queries further, let us know.