To add your booking form to a page, you can use either the included Gutenberg block or shortcode.
For the Gutenberg block, on the page edit screen, just click the + button to add a new block, search for booking form and add the Booking Form block to the page.
More information about the block.
You can also add the booking form to your page using the following shortcode:
To use this shortcode on the page edit screen, just click the + button and add a new shortcode block to the page. Then write or paste in the above shortcode.
You can view more information and the available shortcode attributes here.