Reservation summary and "Thank you" page
You will use the Reservation summary shortcode or bloc only if you use a “Thank you” page where you redirect the customer to the reservation confirmation screen, known as "Thank you" page.
Shortcode [hb_reservation_summary]
Use the [hb_reservation_summary] shortcode in your "Thank you" page, if you use the "thank you_page_url" parameter in a booking form shortcode. When customers are redirected to your "Thank you" page, they will see the reservation confirmation screen with the summary of the reservation.
Parameters: none
Reservation summary block - Gutenberg

There are no parameters for this block.