Question Collaborative learning with POCA and curriculum learning

Hello
I have 2 agents in a room and their goal is to push a ball into a goal. I use collaborative learning with Unity's POCA trainer and give a reward for when the ball gets closer toe the goal just to the agent group, so no individual rewards.
My problem is that I want to use curriculum learning but that seems to use individual mean reward for incrementing lessons. In my case individual reward is always 0.

How would I go about using curriculum learning in my case?

I see no way to get the groups cummulative reward in script so I don't think I can implement my own curriculum learning.

 

Same question answered here: https://forum.unity.com/threads/curriculum-learning-and-self-play.984662/