I want to have the option to add a ToolTip for column, 

 <telerik:DataGridTextColumn IsFrozen="True" HeaderText="BirthDay"
                                            DataMemberBinding="{Binding BirthDay}"
                                            ToolTipProperties.Text="{Binding BirthDay}" />

Scenario: I want to bind two properties to a column, So I created Text column and set DataMemberBinding property to binding these two properties,

<telerik:DataGridTextColumn HeaderText="Country">
                    <telerik:DataGridTextColumn.DataMemberBinding>
                        <MultiBinding Converter="{StaticResource MultiConverter}">
                            <Binding Path="Country" />
                            <Binding Path="City" />
                        </MultiBinding>
 </telerik:DataGridTextColumn.

The DataGrid will crash when there is a bunch of CollectionChanged events with Grouping enabled. This happens in 6.6.0, 6.7.x and 6.8.x versions of the Telerik DataGrid. 

Add FontAutoScalingEnabled property to the header, textcell, groupheader, where font size can be set.

for the Label there is such property https://learn.microsoft.com/en-us/dotnet/maui/user-interface/fonts?view=net-maui-8.0#disable-font-auto-scaling that allows you to disable the text scaling

It seems that the default fonts in the RadDataGrid do not support some languages, for example this text "이름" cannot be displayed in Android and WinUI. Rectangles are rendered instead of the correct symbols.

Note that a maui Label can properly display the text.