Reminders should have been generated for past due categories based on the configuration in the Standards Library. Those reminders are not generated or displayed on the Review List page.
Categories that are part of an open review will not have new reminders generated in the system on the Review List page. An open review is considered any review that is not marked 'Review Complete'.
Note: Reminders are initiated when a vCIO clicks Submit Review for those categories on that review.
Learn more about how reminders are generated here.