Nav Divider
Nav dividers are a decorative element that visually divides your menu into sections.
To add one, go to your menu in the app customizer, and add a new WordPress/External link. Enter the following:
Url: #
Title: Whatever
Add the item to your menu, then click it to expand. Under extra classes, add "divider".
If you'd like to change the styling of the divider, you can use custom CSS in the Colors section.
The specific selector is:
.menu-inner ion-list .item.divider { }