Zz'Rot and Banner of command damage should show as damage to turrets/objectives in end game stats

I main Ivern and I buy Zz'rot and Banner of command in most games and its really frustrating that the damage that they do to towers and inhibs doesn't show up in the end of game stats. I also feel like if its not showing up there it probably also isn't affecting my grade from the game and its really frustrating because its often 10k or more damage. Since the runes reworked came out, I can't seem to get an S or S+ on him despite having a 75% win rate and good kill participation. Does anyone know if item use contributes to getting an S?

Also, can we please get an Ivern skin! I would absolutely buy a 4 seasons Ivern skin or chromas.