While saving a record record using Form and Sub Grid in Model Driven App we should have an option to configure confirmation dialog OOB. Currently we can do that in OnSave event by preventing the default save and show the dialog using Javascript then call the Save function explicitly. This works in the form but as per the response from the product team, this is not supported in Editable Grid.

So it would be a great features to have that as business wants to show a confirm dialog while saving data sometimes.