maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue3086.xaml

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
			 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
			 x:Class="Xamarin.Forms.Controls.Issues.Issue3086">
<ListView x:Name="TestListView"
		  IsGroupingEnabled = "true"
		  HasUnevenRows="true">
	<ListView.GroupHeaderTemplate >
		<DataTemplate>
			<ViewCell Height="30">
				<ContentView>
					<Label Text="{Binding GroupName}" BackgroundColor="Green"/>
				</ContentView>
			</ViewCell>
		</DataTemplate>
	</ListView.GroupHeaderTemplate >

	<ListView.ItemTemplate>
		<DataTemplate>
			<ViewCell>
				<ContentView>
					<Label Text="{Binding}"/>
				</ContentView>
			</ViewCell>
		</DataTemplate>
	</ListView.ItemTemplate>
</ListView>
</ContentPage>