Do you even know how to count? Its easy. Its not necessary to put it there. The spaces in F6 panel is needed to put important things about the group/squad soon.
there are a lot of buttons on the f6 panel, so the idea of adding a new button is ridiculous, and I don't support adding a new button for this graffiti, my vote is
You can type graffiti to see how many you have or scroll down
Positive. Why is there negative votes on this ? Some new players may not even know that group graffiti exists at ALL unless they stumble upon it in F6 plus, F6 is designed to include everything there is to know about your group so why not include this as well.
I don't see enough reasons to add this to the F6 panel, you can do /graffiti and you will see how many graffitis your group have... I'm voting negative