When the value of a property used in a PropertyAggregateDescriptor changes, and the aggregate is displayed in the group header with GroupAggregatesAlignment="NextToHeader", the header does not reflect the updated aggregate result. This issue also occurs when RenderMode is set to SkiaSharp.

In the current DataGrid implementation, the DataGrid will start with all the groups expanded. The only way to have any form of preference is to programmatically interact with the DataView after data is presented in the control  https://docs.telerik.com/devtools/maui/controls/datagrid/grouping/expand-collapse 

Requested Feature
A better approach that I am requesting a feature for is to have a property available for the DataGrid that sets this value ahead of time.

For example, you could add it as a BindableProperty on the GroupDescriptor class and on the GroupDefinition is to have an IsExapanded property.

If the data you want to group by is not set by the time the data grid's ItemsSource is set, then the grouping doesn't work as expected. Everything gets into a single group called (blank)

Provide a RowStyleSelector property to the DataGrid control.

expand a row and collapse it. Or expand a few rows, scroll around a bit, and then collapse one. You can get into some weird situations. Gray background over the group, row background and alternate styles are reset. 

When DataGrid is grouped and applying filtering, aggregates footer appears in the cells

Some data is missing from the UI when grouping is applied and then filter the data. 

If you ungroup, the items are displayed.

Starting with v10, all groups except the last, get a blank, empty row.

If you toggle off the grouping, the empty rows go away, but once you put the grouping on, these empty rows show up again.

Keep the data grouped, make the window a bit smaller so you have a decent amount of rows to scroll through, and using your mouse wheel, scroll up and down quickly. Eventually you'll notice that the grid will start to bounce a bit. For example, you'll scroll down and then without scrolling the mouse wheel up at all, it'll jump back up a few rows on its own.

Begin editing the first cell firs column
Without closing the cell editor, scroll down to the last cell, the first cell should exit the viewport.
Start editing the last cell.
Scroll back up to the first cell

The content inside the first cell is missing.

The content should be there.

when setting a custom font to the column header style, the DataGrid crashes with null ref exception on WinUI.

If you use FooterContentTemplate to add elements into the footer that require mouse over/click events (eg a Button or a Label with a tooltip), it works fine as long as the datagrid has enough data to scroll. However, if you resize the grid bigger or remove items until you no longer need to scroll and you have empty space between the last row and the footer, then none of those mouse events work.

Delegate aggregate descriptor does not update value in the UI when adding/removing item.

The behavior also happens with the property aggregate descriptor.

Provide an option to group the columns in Telerik MAUI DataGrid control. Similar like in the WPF GridView control: https://docs.telerik.com/devtools/wpf/controls/radgridview/columns/column-groups 

Aggregates error appears in column with nested properties when the data you want to group by is not set by the time the data grid's ItemsSource is set,

When grouping in the DataGrid, add an option to align aggregates in group header based on the columns they are applicable

NullReferenceException when entering the cell in edit mode, then refreshing the data, then enter the cell in edit mode and pressing the Enter key

When a ComboBox editor is open in the DataGrid, one can use the arrow keys to go up and down the items of the combo in order to make a selection. When pressing Enter it is expected that the ComboBox gets closed and the DataGrid is still in edit mode for the same cell.

However, when the Enter is pressed - the ComboBox closes and the next row goes into edit mode - this behavior is erroneous.

When using ImageButton inside a CellTemplate, the image does not display initially. When you resize the window image is displayed. 

 

Workaround:

Use Image instead of ImageButton

 

When entering a cell in edit mode its value is displayed on the next cell and the cell editor template uses MaskedEntry.