BrowserTabItemUC.xaml

<UserControl x:Class="WPFWebView2TabControlWithSelector.BrowserTabItemUC"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:WPFWebView2TabControlWithSelector"
             xmlns:wv="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <local:WPFTabBrowser x:Name="WebView"
                     CoreWebView2InitializationCompleted="WebView_CoreWebView2InitializationCompleted"
                     Source="{Binding Path=Source, Mode=TwoWay}"/>
        <!--<wv:WebView2 x:Name="WebView"
                             CoreWebView2InitializationCompleted="WebView_CoreWebView2InitializationCompleted"
                             Source="{Binding Path=Source, Mode=TwoWay}" />-->
    </Grid>
</UserControl>