hi Pete
looks 'nearly) right to me - what is in the inserts of the control room (the other tab in the control room png) - the cuemix should have the vst connnect cue plug in it.
some initial problems might be:
TalkBack isn’t enabled for the cue mix (the TB button should be lit up green on the cue in the control room)
You are monitoring the ‘cue’ for the cue mix - you might want to just try ‘mix’ if you haven’t actually set up a cue mix ?