.NET Maui中如何设置SFDataGrid分组标题行样式？

我在.NET Maui应用中使用Syncfusion SFDataGrid，已通过KeySelector实现自定义行分组，但设置GroupSummaryRowBackground等属性后仍无法修改分组标题行（即图中“Date Needed”行）的颜色，也未找到相关文档指引。

当前使用的代码： #

<sf:SfDataGrid
    x:Name="dataGrid"
    Grid.Row="1"
    Grid.Column="1"
    Margin="10"
    AllowEditing="True"
    AllowGroupExpandCollapse="True"
    AutoExpandGroups="False"
    AutoGenerateColumnsMode="None"
    EditTapAction="OnDoubleTap"
    GridLinesVisibility="Both"
    HeaderGridLinesVisibility="Both"
    ItemsSource="{Binding OrderItems}"
    NavigationMode="Cell"
    SelectionMode="Multiple"
    SortingMode="Single">

    <sf:SfDataGrid.DefaultStyle>
        <sf:DataGridStyle
            CurrentCellBorderColor="{AppThemeBinding Light={StaticResource HeaderBackgroundLight},
                                                     Dark={StaticResource HeaderBackgroundDark}}"
            GroupSummaryRowBackground="{AppThemeBinding Light={StaticResource HeaderBackgroundLight},
                                                        Dark={StaticResource HeaderBackgroundDark}}"
            GroupSummaryRowTextColor="{AppThemeBinding Light={StaticResource TextHeaderLight},
                                                       Dark={StaticResource TextHeaderDark}}"
            HeaderRowBackground="{AppThemeBinding Light={StaticResource HeaderBackgroundLight},
                                                  Dark={StaticResource HeaderBackgroundDark}}"
            HeaderRowFontAttributes="Bold"
            HeaderRowTextColor="{AppThemeBinding Light={StaticResource TextHeaderLight},
                                                 Dark={StaticResource TextHeaderDark}}"
            RowBackground="{AppThemeBinding Light={StaticResource PrimaryBackgroundLight},
                                            Dark={StaticResource PrimaryBackgroundDark}}"
            RowTextColor="{AppThemeBinding Light={StaticResource TextLight},
                                           Dark={StaticResource TextDark}}"
            SelectedRowTextColor="{AppThemeBinding Light={StaticResource White},
                                                   Dark={StaticResource White}}"
            SelectionBackground="{AppThemeBinding Light={StaticResource CallToActionLight},
                                                  Dark={StaticResource CallToActionDark}}" />
    </sf:SfDataGrid.DefaultStyle>
</sf:SfDataGrid>

内容的提问来源于stack exchange，提问作者Braydon Griffith