Have you noticed when in a group message?

I just noticed when I was in a group message I could see when the others were typing and when they read my message? Does this only work when messaging others who have the note 5? That was the case but I can't find any options for this

I should mention that I did find settings for "chat" that would allow me to see the others typing and when they have read my message...but I had turned those off before noticing the typing message and had confirmed they were off after noticing.