how to get native tabbedpage on UWP using xamarin.forms?

I am trying to create below native uwp tabbed page with xamarin.forms but it doesnt work somehow. I am not sure if it is a bug.
I want to have only tabs no navigation bar or title.

I opened the default template with tabbedpage and NavigationPage.HasNavigationBar="False"on every single page including tabbedpage itself.

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" NavigationPage.HasNavigationBar="False"
             x:Class="SamsonBle.Views.ItemsPage"
             Title="{Binding Title}"
             x:Name="BrowseItemsPage">

It removed the navigationbar but there is big gab above the tabs. why is that? how to fix this?

2nd question; see the native view it has settings and login icon on the right side. is it possible to add custom view or icons like that? Do i need some custom renderers for that?