Unless there's some convoluted way to get MIDI to VEPro 7 on my slave using Audio MIDI and the MIDI networking feature.
You could use The non pro version of Vienna Ensemble on your 5,1. Send network midi to it...and mix the audio back into your M1 or wherever using various digital audio means rather then through the plugin...there might be some latency in there and you lose the elegant mechanism whereby normally VePro can do Plugin Delay Compensation to sync everything up perfectly. But its certainly doable until VePro catches up with Apple Silicon.