Hi Mendix,
We would love to be able to display totals within datagrid 2 and right now this is only possible with custom filters if you want to filter with associations.
The best would be to create a total row option in the properties, but making it possible to get the filtered list from the context of the datagrid inside for example a onchange microflow would also work. At the very least support to save the filter in a attribute for associations.