Looks like dropdown filters have some limitations in terms of values displayed.
The values are currently sorted in ascending order and its does not seem to be possible to see the values in descending order.
Looks like this is a feature request being worked upon by AWS already as per - Parameter list custom order
Also, it would be nice if the greatest value could be selected by default on page load rather than a static value selected when the dashboard was published.
For instance, if dropdown shows dates, it would be nice to see the current date selected by default when page is loaded.
Is this feature being worked upon or can be worked upon as well?