In the Hotel Booking documentation sent via email, and under the section of “Add Accommodation Type”, and on page 9, there is an image of the “Details” configuration.
But I’m not seeming this “Details” section when I set up a New Accommodation”.
The “Details” section you can see in the documentation is a screenshot of the front-end, not the back-end. It is added in the documentation, so you could see how the section looks like on your website depending on capacity configuration.