list not displaying items

I have an issue with displaying items in a list view. I have tried to add Mode= twoway, oneway or default.

I have checked the binding

  <ListView x:Name="list"  
                        HasUnevenRows="True" 
                        IsPullToRefreshEnabled="True"
                        HorizontalOptions="CenterAndExpand" 
                        VerticalOptions="FillAndExpand"
                        VerticalScrollBarVisibility="Never"
                       
                        CachingStrategy="RecycleElement"
                        ItemsSource="{Binding DateFormatList}"
                        SeparatorVisibility="Default" >
                        <ListView.ItemTemplate>
                            <DataTemplate>
                                <ViewCell>
                                   <Label Text="{Binding DateType}" TextColor="black" HorizontalOptions="Start" FontSize="14" HorizontalTextAlignment="Center"  ></Label>
                                </ViewCell>
                            </DataTemplate>
                        </ListView.ItemTemplate>
                    </ListView>                                                           
    

Back of my page

public DateSettings()
        {
            InitializeComponent();
            BindingContext = new CustomSettingsViewModel();
        }

My Ctor in the view model

 public List<DateFormat> DateFormatList { get; private set; }
public CustomSettingsViewModel()
{
      
            DateFormatList = new List<DateFormat>();
            DateFormatList.Add(new DateFormat
            {
                DateType = "yy/dd/mm",
              
            });
}

Model

 public class DateFormat
    {
        public string DateType;
    }

you can only bind to public properties

public class DateFormat
{
    public string DateType { get; set; }
}