Hello, I installed the starter…

Hello, I installed the starter spa theme and am having trouble with the navigation menu. In wp-admin, I created the menu items with sub menu item, but they are not nested. Also, the menu is not scrollable so you cant see the menu items that are “below the fold”. Not sure if the theme even supports this, so I thought I would ask. Thanks!

Using wordpress 5.2. Ive attached screenshots of the admin menu builder and a screenshot of the websites homescreen.

Attachment: frontend-menu-not-nested_284946554.jpg
Attachment: wp-admin-menu-sub-items_1082014779.jpg