How to simply modify post process via blueprint??

I would like to change parameters of a post process (not volume, but component within bp) via blueprint. but i cannot seem to even enable/disable it. shouldnt this work as a first step??
Screenshot 2024-05-09 132526

Make Post Process Settings
Set Settings

Enable/Disable

image

Post Process component is a Volume. By default it is Unbound (global). Priority needs to be increased if another post process volume is in the level an unbound (Infinite).

Effects only apply when the camera is inside the volume. If Bound you need to define the volume using a Box Collision.