I don’t have a Host solution for you but, maybe a potential work-around that may get you the results you need while development makes Host play nice with Waves plugins.
You said it is not working in VST or VST3, so I presume you are in a DAW. Rather than using Host, you could use a multi channel audio device in the VCV VST and have your DAW break the outputs into separate channels, then run your waves plugins on the channels that need them directly from your DAW.