How do I get this kind of virtual display on Zorin 16?
any Linux distribution using GNOME 42
ZorinOS 16 uses Gnome 40 (I think it may even be lower version than that), so it's unlikely this method will work. Z17 should be using the most up to date version of Gnome so that will be an option.
I found some articles talking about how to do this in older versions of Ubuntu that you can use, but requires external dependencies and as explained in the article you linked to, the performance will likely not be the same. But you can give it a try: