Insert Separator Line under NavigationBar in Android

[AlleSchonWeg]

Hi,
i have ContentPages which are pushed on the navigation stack. Sometimes with a TitleView, somtimes without (setting just the Page.Title). The NavigationPages are children of a TabbedPage.
Now i want to add a separator line under the NavigationBar. In Xamarin Forms i created a NavigationPage custom renderer and set a drawable as foreground in the AndroidX.AppCompat.Widget.Toolbar. This works.
How can i do this in MAUI?

[AlleSchonWeg]

My trick is to set a BarBackground with a LinearGradientBrush:

	<Style TargetType="NavigationPage"
		   ApplyToDerivedTypes="True">
		<Setter Property="BarBackground">
			<OnPlatform x:TypeArguments="Brush">
				<On Platform="Android">
					<LinearGradientBrush StartPoint="0,0"
										 EndPoint="0,1">
						<GradientStop Color="{AppThemeBinding Light={StaticResource BackgroundColor}, Dark={StaticResource BackgroundColor-dark}}"
									  Offset="0.0" />
						<GradientStop Color="{AppThemeBinding Light={StaticResource BackgroundColor}, Dark={StaticResource BackgroundColor-dark}}"
									  Offset="0.99" />
						<GradientStop Color="{AppThemeBinding Light={StaticResource SeparatorColor}, Dark={StaticResource SeparatorColor-dark}}"
									  Offset="0.99" />
						<GradientStop Color="{AppThemeBinding Light={StaticResource SeparatorColor}, Dark={StaticResource SeparatorColor-dark}}"
									  Offset="1.0" />
					</LinearGradientBrush>
				</On>
				<On Platform="iOS">
					<SolidColorBrush Color="{AppThemeBinding Light={StaticResource BackgroundColor}, Dark={StaticResource BackgroundColor-dark}}" />
				</On>
			</OnPlatform>
		</Setter>
		<Setter Property="BarTextColor"
				Value="{AppThemeBinding Light={StaticResource BaseTextColor}, Dark={StaticResource BaseTextColor-dark}}" />
	</Style>