What you propose doesn’t seem to be microdosing. But it seems like what you’re saying is not so much about the drug but about the opportunity
I have experienced the effects I talked about above with 300-500 mg doses of raw mushrooms. I don't know the amount of psilocybin... But that is a relatively small dose of mushrooms.
I would say microdosing should allow for the placebo to be effective. So yes, no visible effects. However, it doesn’t seem like they succeeded 100% on that.