Ok - this helped me, so thank you for that. It did however also lead me to discover what I believe is a bug in Wavelab. Here is why I couldn’t find the post-effects option:
When I highlight a clip, obviously there is the huge “focused clip” box off the the right - and yes, the envelope tab is there, along with everything you show in your picture - HOWEVER:
If you resize the entire “focused clip” box, and you make it smaller, the horizontal and vertical scroll bars within the box do not work correctly. Resizing will actually allow you to hide the vertical scroll bar!!! Because of this, I didn’t realize I could scroll down further within the envelope section… so I didn’t see anything regarding the envelope post-effects options… I looked there, and did not find it because the vertical scroll bar was hidden - which led me to believe there was nothing else in the box. Try to resize the “focused clip” box, and you will see what I mean. I can post a screenshot if necessary.