Pawn camera lens setting

lens stting
i need a chromatic aberration on my camera when in key press
how do i get this (Make LensSettings) function at?
its only work on (Make CameraLensSettings) but theres no chromatic aberration there

some one answer pls

no its not a post process volume effect
its a blueprint from cine camera char pawn. i make a zoom key but i want to get some chromatic aberration as well.