Often enough it happens that my species counter moves and I have to wonder, wait what did I see today that I have never seen before. It’s not always easy to figure out.
You can actually see this already with the calendar. Here you can see that I first observed Carpet Bugle on this date: https://www.inaturalist.org/calendar/reuvenm/2019/6/9
I do agree that a easy place to see all your first/last observations of each species would be nice.