Effects using advanced keyframes appear with keyframe tracks at the right side of the Effect Editor. Next to each keyframe track is a triangular opener. The parameter group name appears in a title track at the top of the keyframe tracks.
The keyframe track opens into a keyframe graph.
Depending on how you have the keyframe graph zoomed and scaled, the lines representing the keyframe graph boundaries — start and end of effect, maximum and minimum parameter values — might not be visible. See
Adjusting the View in a Keyframe Graph.