How to create a communication betwen Actor and Actor Component?

I’m developing a platform/fight game, and i’m recreating the physics to get fixed results for my character. Now I’m creating the gravity.

My goal is to make various actor components to reuse in others characters or enemies. However, I have a problem with the communication between the actor that will be the platform and the actor component that should cause the effect of falling.

I don’t know how to make the “platform” activate the custom event inside “Gravity Actor Component” that will indicate if the player is “On Air” or “On Ground”

I found the solution here Communication between Actor Components