The Menu Settings screen will enable you to customise the menu you want to display on your app. This will be displayed as side menu on your mobile app. You can either create your own menu on AppMySite or import a menu from your website.
Navigate to Settings > Menu and turn on the toggle next Auto populate my app menu.
This option allows you to directly import all menus from your WordPress website. Follow the steps below to pick a menu from your website:
In case you do not wish to show a side menu in your app, simply disable both the toggles on the Menu screen. This will remove the side menu from your app completely.