Sort by Flagged items on Apple Watch for OmniFocus


I would like to use a custom perspective which is grouped by “Flagged” and is sorted by “Flagged”. And the perspective filters “Due or Flagged” items.

By the way I couldn’t see Flagged item at the top on Apple Watch’s complication. In my understanding it should be there.
Did I do something wrong?

Please let me know what I should do to solve it.