Drag listviewitem using DragViewindicator

To drag and drop the items by DragIndicatorView, set the SfListView.DragStartMode property to OnDragIndicator. To display the dragging item, define any custom user interface(UI) in DragIndicatorView.

Note : You must set the SfListView instance as reference to the ListView property in DragIndicatorView.

<ContentPage xmlns:syncfusion="clr-namespace:Syncfusion.ListView.XForms;assembly=Syncfusion.SfListView.XForms">
  <syncfusion:SfListView x:Name="listView" 
                   ItemsSource="{Binding ToDoList}"
                   DragStartMode="OnDragIndicator"
                   BackgroundColor="#FFE8E8EC"
                   ItemSize="60">
  <syncfusion:SfListView.ItemTemplate>
    <DataTemplate>
      <Grid Padding="10">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="60" />
          </Grid.ColumnDefinitions>
          <Label x:Name="textLabel" Text="{Binding Name}" Grid.Column="1" FontSize="15" TextColor="#333333" />
          <syncfusion:DragIndicatorView Grid.Column="2" ListView="{x:Reference listView}" 
                    HorizontalOptions="Center" 
                    VerticalOptions="Center">
            <Grid Padding="10, 20, 20, 20">
              <Image Source="DragIndicator.png" />
            </Grid>
          </syncfusion:DragIndicatorView>
        </Grid>
      </Grid>
    </DataTemplate>
  </syncfusion:SfListView.ItemTemplate>
</syncfusion:SfListView>                
</ContentPage>

To know more about DragAndDrop in ListView, please refer our documentation here