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

 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}" />

Add text wrap formatting as the normal windows DataGrid control.

.Net Maui Data Grid Property Aggregator Descriptor disappears when displaying columns in the same data grid which doesn't have aggregate property set

IsCaseSensitive property doesn't work in the DataGrid control.

Workaround: Use Programmatic Filtering 

Example: https://github.com/telerik/maui-samples/tree/main/Samples/SdkBrowser/Examples/DataGridControl/FilteringCategory 

Disable the built in filtering UI and apply a custom UI with programmatic filtering.

Provide a user commands as RadListView that you could directly bind in the ViewModel.

Solution: 

Enhance the DataGridCommand class as a user command and in this way bind it to the defined commands inside ViewModel/ContentPage. - Sample project attached