Side chain inputs not being created

I can only get the the side chain input to be created by Steinberg Plugs. None of my Waves, Eventide, Melda, etc are creating the channel. Thoughts? :question:

the plugins need to be vst 3 (have 3 dashes next to the vst name)
if you do it right there should be a “Activate Side-Chain” at the top of the VST