I'm working with the RadExpander for .NET MAUI (6.3..0), and while it works fine on Android, it seems to lack a default IndicatorText on iOS and instead renders with a boxed question mark. It looks OK when I specify some IndicatorText string, but I'm not sure what the built-in character is and I'd love to get that to match (and have the orientation of that character be natural as well).

Here's what it looks like:

and expanded, it becomes:

  <telerik:RadDataGrid x:Name="dataGrid"
                         ItemsSource="{Binding People}">
        <telerik:RadDataGrid.GroupHeaderTemplate>

              <telerik:RadTreeView x:Name="treeView" 
                         ItemsSource="{Binding Items}" 
                         CheckBoxMode="Recursive">
        <telerik:TreeViewDescriptor DisplayMemberPath="Name"
                                    ItemsSourcePath="Children"
                                    TargetType="{x:Type local:Item}" />
        <telerik:RadTreeView.BindingContext>
            <local:ViewModel/>
        </telerik:RadTreeView.BindingContext>
    </telerik:RadTreeView>


        </telerik:RadDataGrid.GroupHeaderTemplate>        
    </telerik:RadDataGrid>

 public class Item
    {
        public Item(string name)
        {
            this.Name = name;
            this.Children = new ObservableCollection<Item>();
        }

        public string Name { get; set; }
        public IList<Item> Children { get; set; }
    }