Xamarin Grid does not split evenly - xaml

Question

I want two labels contained within a ListView DataTemplate Cell to split evenly horizontally across the screen.
From my understanding,
if you use a Grid and set the two ColumnDefinitions to 1* it should work. I tried this and it does not display as expected.
I had to add a large WidthRequest to the first Label to get it to work.
I also tried setting the HorizonalOptions on the Grid and labels to FillAndExpand and that had no results.
<ViewCell>
<Frame HasShadow="true" Margin="2">
<StackLayout Orientation="Horizontal" Margin="0,0,0,0" >
<StackLayout WidthRequest="20" BackgroundColor="{Binding RYGStatusColor}" >
<Label Text="{Binding RYGStatusLetter}" HorizontalTextAlignment="Center"
FontSize="Medium" FontAttributes="Bold" TextColor="White" />
</StackLayout>
<StackLayout Orientation="Vertical">
<Label Text="{Binding ProgramName}" FontSize="Medium" FontAttributes="Bold" />
<Label Text="{Binding DesignCustomerName}" FontSize="Small" />
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Label Grid.Row="0" Grid.Column="0"
Text="{Binding EstimatedTotalValue, Converter={StaticResource CurrencyDisplay}}"
FontSize="Small" FontAttributes="Bold" WidthRequest="1024" />
<!-- WidthRequest is a hack to force the width to be equal across the screen. -->
<Label Grid.Row="0" Grid.Column="1" FontSize="Small">
<Label.FormattedText>
<FormattedString>
<Span Text="Modified: " />
<Span Text="{Binding ModifiedDate, StringFormat='{0:M/d/yy}', Converter={StaticResource LocalTime}}}" />
</FormattedString>
</Label.FormattedText>
</Label>
</Grid>
</StackLayout>
</StackLayout>
</Frame>
</ViewCell>
Without the WidthRequest hack, I get these results: Actual Results
Row 1
"Label1 Label2 "
Row 2
"Label1 Label2 "
With the hack, I get expected results:Expected Results
Row 1
"Label1 Label2 "
Row 2
"Label1 Label2 "

Answer 1

I suspect the Grid is splitting itself correctly, but it is not taking up the full space that you are expecting. Try adding HorizontalOptions="FillAndExpand" to the Grid itself and report back.

Answer 2

I want two labels contained within a ListView DataTemplate Cell to split evenly horizontally across the screen.From my understanding, if you use a Grid and set the two ColumnDefinitions to 1* it should work. I tried this and it does not display as expected.
I use your code in ListView datetemplate, and don't use widthrequest, I get the following result. Xamarin.Form version is 3.4.0.1008975.
Here is the code:
<ContentPage.Content>
<ListView ItemsSource="{Binding models}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="1*" />
</Grid.ColumnDefinitions>
<Label
Grid.Row="0"
Grid.Column="0"
BackgroundColor="Blue"
FontAttributes="Bold"
FontSize="Small"
Text="{Binding str1}" />
<!-- WidthRequest is a hack to force the width to be equal across the screen. -->
<Label
Grid.Row="0"
Grid.Column="1"
BackgroundColor="Yellow"
FontSize="Small">
<Label.FormattedText>
<FormattedString>
<Span Text="Modified: " />
<Span Text="{Binding str2}" />
</FormattedString>
</Label.FormattedText>
</Label>
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ContentPage.Content>