Xamarin Community Toolkit TabView badge does not work with ControlTemplate - xamarin.forms

Question

I am using the Xamarin Community Toolkit TabView with a ControlTemplate in the TabViewItem, it works well. I tried adding a Badge to the TabViewItem and nothing happens. When I remove the ControlTemplate the Badge works perfectly. As a sanity test, I pulled the XCT sample code and tried adding a control template to a working TabView badge example and got the same results, no badge.
I am hoping that I am just missing something simple, but I have a feeling that the ControlTemplate and Badge are not compatible...
Does anyone have any examples of and XCT TabViewItem using a ControlTemplate and a badge?
Here is the sample xaml from the CustomTabsPage.xaml in the XCT Samples. I modified it by adding a Badge to the first tab, but it does not show the badge.
<pages:BasePage>
<pages:BasePage.Resources>
<ResourceDictionary>
<ControlTemplate
x:Key="TabItemTemplate">
<Grid
RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Image
Grid.Row="0"
VerticalOptions="Center"
HorizontalOptions="Center"
WidthRequest="24"
HeightRequest="24"
Margin="6"
Source="{TemplateBinding CurrentIcon}" />
<Label
Grid.Row="1"
HorizontalOptions="Center"
FontSize="{TemplateBinding FontSize}"
Text="Test"
TextColor="{TemplateBinding CurrentTextColor}" />
</Grid>
</ControlTemplate>
<ControlTemplate
x:Key="FabTabItemTemplate">
<Grid>
<ImageButton
InputTransparent="True"
Source="{TemplateBinding CurrentIcon}"
Padding="10"
HorizontalOptions="Center"
BackgroundColor="#FF0000"
HeightRequest="60"
WidthRequest="60"
Margin="6">
<ImageButton.CornerRadius>
<OnPlatform x:TypeArguments="x:Int32">
<On Platform="iOS" Value="30"/>
<On Platform="Android" Value="60"/>
<On Platform="UWP" Value="36"/>
</OnPlatform>
</ImageButton.CornerRadius>
<ImageButton.IsVisible>
<OnPlatform x:TypeArguments="x:Boolean">
<On Platform="Android, iOS, UWP">True</On>
<On Platform="macOS">False</On>
</OnPlatform>
</ImageButton.IsVisible>
</ImageButton>
<BoxView
InputTransparent="True"
HorizontalOptions="Center"
CornerRadius="30"
BackgroundColor="#FF0000"
HeightRequest="60"
WidthRequest="60"
Margin="6">
<BoxView.IsVisible>
<OnPlatform x:TypeArguments="x:Boolean">
<On Platform="Android, iOS, UWP">False</On>
<On Platform="macOS">True</On>
</OnPlatform>
</BoxView.IsVisible>
</BoxView>
</Grid>
</ControlTemplate>
<Style
x:Key="TabItemStyle"
TargetType="xct:TabViewItem">
<Setter
Property="FontSize"
Value="12" />
<Setter
Property="TextColor"
Value="#979797" />
<Setter
Property="TextColorSelected"
Value="#FF0000" />
</Style>
<Style
x:Key="CustomTabStyle"
TargetType="xct:TabView">
<Setter
Property="IsTabTransitionEnabled"
Value="True" />
<Setter
Property="TabStripHeight"
Value="48" />
<Setter
Property="TabContentBackgroundColor"
Value="#484848" />
<Setter
Property="TabStripPlacement"
Value="Bottom" />
</Style>
</ResourceDictionary>
</pages:BasePage.Resources>
<pages:BasePage.Content>
<Grid>
<xct:TabView
Style="{StaticResource CustomTabStyle}">
<xct:TabView.TabStripBackgroundView>
<BoxView
Color="#484848"
CornerRadius="36, 36, 0, 0"/>
</xct:TabView.TabStripBackgroundView>
<xct:TabViewItem
Text="Tab 1"
Icon="triangle.png"
ControlTemplate="{StaticResource TabItemTemplate}"
BadgeText="Test"
BadgeBackgroundColor="Pink"
BadgeBackgroundColorSelected="Red"
BadgeTextColor="White"
Style="{StaticResource TabItemStyle}">
<Grid
BackgroundColor="LawnGreen">
<Label
HorizontalOptions="Center"
VerticalOptions="Center"
Text="TabContent1" />
</Grid>
</xct:TabViewItem>
<xct:TabViewItem
Text="Tab 2"
Icon="circle.png"
ControlTemplate="{StaticResource FabTabItemTemplate}"
Style="{StaticResource TabItemStyle}"
TabTapped="OnFabTabTapped" />
<xct:TabViewItem
Text="Tab 3"
Icon="square.png"
ControlTemplate="{StaticResource TabItemTemplate}"
Style="{StaticResource TabItemStyle}">
<Grid
BackgroundColor="LightCoral">
<Label
HorizontalOptions="Center"
VerticalOptions="Center"
Text="TabContent3" />
</Grid>
</xct:TabViewItem>
</xct:TabView>
</Grid>
</pages:BasePage.Content>
</pages:BasePage>

Answer 1

You could add a BageView in your ControlTemplate like below and then remove the Badge properties in TabViewItem.
Also please slightly adjust the position of the badge where you want to place it.
<ControlTemplate
x:Key="TabItemTemplate">
<Grid
RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Image
Grid.Row="0"
VerticalOptions="Center"
HorizontalOptions="Center"
WidthRequest="24"
HeightRequest="24"
Margin="6"
Source="{TemplateBinding CurrentIcon}" />
<Label
Grid.Row="1"
HorizontalOptions="Center"
FontSize="{TemplateBinding FontSize}"
Text="Test"
TextColor="{TemplateBinding CurrentTextColor}" />
<xct:BadgeView
Grid.Row="0" Grid.Column="1"
BackgroundColor="Pink"
TextColor="White"
Text="123"
/>
</Grid>
</ControlTemplate>
Reference link:
https://learn.microsoft.com/en-us/xamarin/community-toolkit/views/badgeview