It depends on whether your site is displaying the default pages menu or a custom menu. A custom menu is displayed as your primary menu on the Dyad 2 theme if at Customize > Menus > Menu Locations > View All >ocations > Primary Menu, a custom menu has been selected. If not, then the default menu will display instead.
Default pages menu
If the homepage is titled “Home,” then it will automatically display in the default pages menu.
You may add a “Home” menu item as described and illustrated in the Add Menu Items section of the Site Menus support page.