linewrap or CR/LF

I am trying to do wordwrap on a button on IOS

I tried the following with no joy

Text="Review Leaderboard"

so I went to a custom renderer with also no joy

[ContentProperty("Content")]

public class MultiLineButton : ContentView
{
public event EventHandler Clicked;

protected Grid ContentGrid;
protected ContentView ContentContainer;
protected Label TextContainer;

public String Text
{
    get
    {
        return (String)GetValue(TextProperty);
    }
    set
    {
        SetValue(TextProperty, value);
        OnPropertyChanged();
        RaiseTextChanged();
    }
}

public new View Content
{
    get { return ContentContainer.Content; }
    set
    {
        if (ContentGrid.Children.Contains(value))
            return;

        ContentContainer.Content = value;
    }
}

public static BindableProperty TextProperty = BindableProperty.Create(
    propertyName: "Text",
    returnType: typeof(String),
    declaringType: typeof(MultiLineButton),
    defaultValue: null,
    defaultBindingMode: BindingMode.TwoWay,
    propertyChanged: TextValueChanged);

private static void TextValueChanged(BindableObject bindable, object oldValue, object newValue)
{
    ((MultiLineButton)bindable).TextContainer.Text = (String)newValue;
}

public event EventHandler TextChanged;
private void RaiseTextChanged()
{
    if (TextChanged != null)
        TextChanged(this, EventArgs.Empty);
}

public MultiLineButton()
{
    ContentGrid = new Grid
    {
        VerticalOptions = LayoutOptions.FillAndExpand,
        HorizontalOptions = LayoutOptions.FillAndExpand
    };

    ContentGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
    ContentGrid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });

    ContentContainer = new ContentView
    {
        VerticalOptions = LayoutOptions.FillAndExpand,
        HorizontalOptions = LayoutOptions.FillAndExpand,
    };

    TextContainer = new Label
    {
        VerticalOptions = LayoutOptions.Center,
        HorizontalOptions = LayoutOptions.FillAndExpand,
    };
    ContentContainer.Content = TextContainer;

    ContentGrid.Children.Add(ContentContainer);

    var button = new Button
    {
        VerticalOptions = LayoutOptions.FillAndExpand,
        HorizontalOptions = LayoutOptions.FillAndExpand,
        BackgroundColor = Color.FromHex("#01000000")
    };

    button.Clicked += (sender, e) => OnClicked();

    ContentGrid.Children.Add(button);

    base.Content = ContentGrid;

}

public void OnClicked()
{
    if (Clicked != null)
        Clicked(this, new EventArgs());
}

}
and the XAML

    <StackLayout>
        <custom_controls:MultiLineButton x:Name="Yesbutton" Text="YES: I AM OK WITH YOUR DEALERSHIP REUSING THE PHOTO " Margin="20,10,0,10" VerticalOptions="FillAndExpand"   HorizontalOptions="FillAndExpand" WidthRequest="150" HeightRequest="150" BackgroundColor="Green"/>


    </StackLayout>

what am I missing?