Posted 9 September 2021, 6:23 pm EST
Hello,
On observation of the demo link, I found that the filter icon you mentioned above is sort icons that replicate the column sorting for ascending/descending. By default columns are not sorted, on clicking the column headers the column gets sorted and the sorting icon appears on that column header. You can also provide sortDescriptions array to the collectionView to sort specific columns at the time of initialization.
In the sample, the sortDescriptions contains two columns country and active so initially both columns gets sorted. As for the issue of the last column not having the sort icon was occurring because the active column binding is missing in your code snippet.
Let us know if you still have any doubts.
Regards