If you select the title of your project, you will see a “notecard” for each chapter with an editable summary:
Please note that if you do not have subsections then you will see no notecards for your sections.
For example, in the image below, there are no notecards for section titled “Chapter 1” because it has zero subsections.
In this example below, we added several subsections to the section titled “Chapter 1.” You can now see the notecards populate accordingly: