Setting binding in code in a custom control

I am trying to make a simple control that combines an entry and a label.
The binding doesn't work, however, and I don't understand why.
Can anyone help clarify?

Here's my control xaml

<ContentView xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MyApp.Custom.Controls.LabelEntry">

    <ContentView.Content>

        <Grid x:Name="cGrid">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>

            <Label x:Name="cLabel"
                   Grid.Column="0"/>

            <Entry x:Name="cEntry"
                   Grid.Column="1"/>

        </Grid>

    </ContentView.Content>

</ContentView>

and my control xaml.cs

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class LabelEntry : ContentView
{
    public LabelEntry()
    {
        InitializeComponent();
    }

    #region Binding for LabelText
    public static readonly BindableProperty LabelTextProperty = BindableProperty.Create(
        propertyName: "LabelText",
        returnType: typeof(string),
        declaringType: typeof(LabelEntry),
        defaultValue: "",
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: LabelTextPropertyChanged);

    public string LabelText { get; set; }

    private static void LabelTextPropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cLabel.Text = newValue?.ToString();
    }
    #endregion

    #region Binding for LabelStyle
    public static readonly BindableProperty LabelStyleProperty = BindableProperty.Create(
        propertyName: "LabelStyle",
        returnType: typeof(Style),
        declaringType: typeof(LabelEntry),
        defaultValue: null,
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: LabelStylePropertyChanged);

    public Style LabelStyle { get; set; }

    private static void LabelStylePropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cLabel.Style = (Style)newValue;
    }
    #endregion

    #region Binding for EntryText
    public static readonly BindableProperty EntryTextProperty = BindableProperty.Create(
        propertyName: "EntryText",
        returnType: typeof(string),
        declaringType: typeof(LabelEntry),
        defaultValue: "",
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: EntryTextPropertyChanged
        );

    public string EntryText
    {
        get => (string)GetValue(EntryTextProperty);
        set => SetValue(EntryTextProperty, value);
    }

    private static void EntryTextPropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cEntry.Text = newValue?.ToString();
    }
    #endregion

    #region Binding for EntryPlaceholder
    public static readonly BindableProperty EntryPlaceholderProperty = BindableProperty.Create(
        propertyName: "EntryPlaceholder",
        returnType: typeof(string),
        declaringType: typeof(LabelEntry),
        defaultValue: "",
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: EntryPlaceholderPropertyChanged);

    public string EntryPlaceholder { get; set; }

    private static void EntryPlaceholderPropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cEntry.Placeholder = newValue?.ToString();
    }
    #endregion

    #region Binding for EntryStyle
    public static readonly BindableProperty EntryStyleProperty = BindableProperty.Create(
        propertyName: "EntryStyle",
        returnType: typeof(Style),
        declaringType: typeof(LabelEntry),
        defaultValue: null,
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: EntryStylePropertyChanged);

    public Style EntryStyle { get; set; }

    private static void EntryStylePropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cEntry.Style = (Style)newValue;
    }
    #endregion

    #region Binding for GridStyle
    public static readonly BindableProperty GridStyleProperty = BindableProperty.Create(
        propertyName: "GridStyle",
        returnType: typeof(Style),
        declaringType: typeof(LabelEntry),
        defaultValue: null,
        defaultBindingMode: BindingMode.TwoWay,
        propertyChanged: GridStylePropertyChanged);

    public Style GridStyle { get; set; }

    private static void GridStylePropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        var control = (LabelEntry)bindable;
        control.cGrid.Style = (Style)newValue;
    }
    #endregion
}

and how I use the control

<custom:LabelEntry Style="{StaticResource SimpleLabelEntry}"
                       LabelText="Test Label"
                       EntryPlaceholder="Test Placeholder"
                       EntryText="{Binding TestData}"/>

where TestData is a property that implements INotifyPropertyChanged in my view model