Data is not binding in Xamarin android app

I have created a reusable component foor Patient card with icon and text:

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class PatientInfoCard : ContentView
{
    public static readonly BindableProperty TitleProperty = BindableProperty.Create(
        nameof(Title),
        typeof(string),
        typeof(PatientInfoCard),
        default(string)
    );
    
    public string Title
    {
        get => (string)GetValue(TitleProperty);
        set => SetValue(TitleProperty, value);
    }
    
    public PatientInfoCard()
    {
        InitializeComponent();
    }
}

Its xaml:

<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MobileApp.Control.PatientInfoCard">
  <ContentView.Content>
        <StackLayout Background="green" Padding="10" >
            <StackLayout Margin="10,10,10,0" BackgroundColor="gray">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <Label Grid.Column="0" Text="{Binding Title}" FontAttributes="Bold" VerticalOptions="Center" />
                    <Label Grid.Column="1" Text="{Binding Title}" FontAttributes="Bold" VerticalOptions="Center" />
                </Grid>
                <Label Text="{Binding Description}" Margin="10,5,10,10" VerticalOptions="CenterAndExpand" />
            </StackLayout>
        </StackLayout>
  </ContentView.Content>
</ContentView>

Then I try to use it in a grid:

<Grid Margin="10" Grid.Row="6" Grid.ColumnSpan="2" RowSpacing="10" ColumnSpacing="10"
      x:DataType="Control:PatientInfoCard">
    <Control:PatientInfoCard Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" Title="Vaistai"/>
    <Control:PatientInfoCard Grid.Row="0" Grid.Column="3" Grid.ColumnSpan="3" Title="Tyrimai" />
    <Control:PatientInfoCard Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"  Title="Ligos"/>
    <Control:PatientInfoCard Grid.Row="1" Grid.Column="2" Grid.ColumnSpan="2" Title="Alergijos"/>
    <Control:PatientInfoCard Grid.Row="1" Grid.Column="4" Grid.ColumnSpan="2"  Title="Skiepai"/>
</Grid>

It gives me only 5 blocks template (no Title and Icon):

So I guess that binding values are not working properly? What do my code lack of?

One way to bind from a View's XAML to its own code-behind is to define an x:Name for the XAML-part, e.g. PatientCard and then use x:Reference PatientCard as a Source in the Binding:

<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MobileApp.Control.PatientInfoCard"
             x:Name="PatientCard">
  <ContentView.Content>
        <StackLayout Background="green" Padding="10" >
            <StackLayout Margin="10,10,10,0" BackgroundColor="gray">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>

                    <Label Grid.Column="0"
                           Text="{Binding Title, Source={x:Reference PatientCard}}"
                           FontAttributes="Bold"
                           VerticalOptions="Center" />

                    <!-- ... -->

                </Grid>
            </StackLayout>
        </StackLayout>
  </ContentView.Content>
</ContentView>

Alternatively, you can also set the BindingContext = this; or to a ViewModel or Model class in the code-behind:

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class PatientInfoCard : ContentView
{
    //...

    public PatientInfoCard()
    {
        InitializeComponent();
        BindingContext = this;
    }
}