UE5.3.2 Foliage not moving when collision sphere passing

Hiya,
I’m quite new to Unreal Engine and I am considerably lost on this one, despite multiple yt tuts, reddit browses and this site lurks.

In my map I have an instanced foliage actor with multiples trees in it wich all have some wind effects I worked on, that parts works, but I need to make the wind effect amplificate when a collision sphere is passing / overlaping in the foliage. I tried using a BP with a collision sphere and a custom event (WhenOverlap) to make the material parameter change but it is not working at all.

I tried to use some already built foliage movments like the one I need from some free stuff, but I can’t seem to work it out correctly.

For more details, I am trying to simulate the wind effect of the rotors from an helicopter when landing on the ground close to some vegetation !

If yall need more info, lemme know
Thank you very much !