I think it's called restorative justice or something? (it might not be called restorative justice - I might have gotten two terms mixed up) I've never seen the value in it. Basically you say "you did that and it made me feel that and therefore I have this issue now"
I'd assume (assume, not just fear) the reply would be "I never did that, HA! you felt like that! *does a little jig* and you're seriously messed up! Now I'm going to call my co-bullies and have a drink in your dishonor."

I don't see how exposing yourself to that could ever be helpful. It (the restorative justice thingy) might help if someone made a genuine acciental mistake - but bullying someone isn't an accident, it's a choice.

Anyway, people talk about similar stuff on the Survivors forum sometimes - you might want to have a look or a search there. https://forums.psychcentral.com/survivors-abuse/