Widget component affects all BPs

Thank you for sharing your information. It already helped me a bit

I am controling the scalar parameter value of an actor with the value from widget that I applied to the Widget Component.

Acutally it would be:
value from widget inside a widget → called to the Blueprint A I’ve created (and copied 3 times to the level), → to control the scalar parameter value on material from another Blueprint B.

and I’ve called Blueprint B to A by Get actor of class

I would love to just show you the blueprints, but then there would be too many photos.