How to remove Expander (SfExpander) from ItemTemplate of Xamarin.Forms (SfListView)

public class ViewModel
{
    public Command<object> ReadCommand { get; set; }
    public Command<object> DeleteCommand { get; set; }
 
    public ViewModel()
    {
        ReadCommand = new Command<object>(OnReadClicked);
        DeleteCommand = new Command<object>(OnDeleteClicked);
        GenerateSource();
    }
 
    private void OnDeleteClicked(object obj)
    {
        var expanderItem = obj as InboxInfo;
        this.InboxInfo.Remove(expanderItem);
    }

    private void OnReadClicked(object obj)
    {
        var expanderItem = obj as InboxInfo;
        expanderItem.FontStyle = FontAttributes.None;
        expanderItem.IsExpanded = false;
    }
}

<sflistView:SfListView x:Name="listView" ItemsSource="{Binding InboxInfo}" AutoFitMode="DynamicHeight" ItemSpacing="1" BackgroundColor="LightGray">
    <sflistView:SfListView.ItemTemplate>
        <DataTemplate>
            <expander:SfExpander HeaderIconPosition="Start" HeaderBackgroundColor="White" IsExpanded="{Binding IsExpanded}">
                <expander:SfExpander.Header>
                    <Grid Padding="10,0,0,0" HeightRequest="70">
                        ...
                        <Grid HorizontalOptions="StartAndExpand">
                            <Label LineBreakMode="NoWrap" TextColor="#474747" FontSize="18" FontAttributes="{Binding FontStyle}" Text="{Binding Title}" VerticalOptions="Center"/>
                            <Label LineBreakMode="NoWrap" TextColor="#474747" Grid.Row="1" Text="{Binding Subject}" FontSize="16" VerticalOptions="Center"/>
                        </Grid>
                        <Label TextColor="#474747" HorizontalOptions="EndAndExpand" Padding="5,10,5,10" Grid.Column="1" LineBreakMode="NoWrap" Text="{Binding Date}" FontSize="12"/>
                    </Grid>
                </expander:SfExpander.Header>
                <expander:SfExpander.Content>
                    <Grid HeightRequest="100" >
                        ...
                        <Label TextColor="#474747" Text="{Binding Description}" VerticalOptions="Center"/>
                         <Grid Grid.Row="1">
                              <Button x:Name="save" Text="Mark as read" Command="{Binding Path=BindingContext.ReadCommand, Source={x:Reference listView}}" CommandParameter="{Binding .}" FontSize="15" BackgroundColor="#28abb9" CornerRadius="5" TextColor="White"/>
                              <Button x:Name="delete" Text="Delete" Command="{Binding Path=BindingContext.DeleteCommand, Source={x:Reference listView}}" CommandParameter="{Binding .}" Grid.Column="1" FontSize="15" BackgroundColor="#ea2c62" CornerRadius="5" TextColor="White"/>
                        </Grid>
                    </Grid>
                </expander:SfExpander.Content>
            </expander:SfExpander>
        </DataTemplate>
    </sflistView:SfListView.ItemTemplate>
</sflistView:SfListView>