Yes, it shows. It’s definitely related to how Glide is counting the date field and displaying in calendar format.
I have another list relation showing with a string-based filter applied. I’m checking for the string " + (HV" in the title. It shows a count of 21 in the list relation, but inside (displayed as calendar) there are only 17 items. When I change the format to something to non-calendar it shows 21 items.