How does the activity count icon work?

Hi, I’m curious how the little activity icon works. It seems it only totals row comments. Is that intentional? Also, is there any way of having the icon always show up in the very left hand column where you open the row summary window? The this would be useful is that my primary column is not always the first column so it’s odd having the comment count show up a couple of columns down.
Screenshot 2024-02-01 at 8.55.43 am