Making a "view-only" instance accessible online

Hi there - I want to be able to make a “view-only” instance available.
My plan is that I want to setup a couple of “factories” with all the equipment I have and make a pentester lab on real devices. I already have the lab, I just need to know if I’d be able to setup a view-only scenario, so that people are able to see if they actually manage to make some havoc on the PLCs… Hope this makes sense.