To a content menu on the page, use the Contents menu component, each items needs to be add using the Contents Menu Item component.
Note: best to have this as the first component on the page and for anchor links menu
Click on the Contents menu component
This will add the following in the CK Editor
Click inside the body, and select the Contents Menu Item component.
Type the link text, and highlight the text and click Link button to enter the URL or the anchor link
Repeat until you have all the menu items in place.