Tax the crap out of it, make it uneconomical for those who don’t need it.
Rich people have no need for fake grass. There’s plenty of acres to take the dog piss and shit and Jeeves will take care of the gardening.
Fake grass is for people that for some reason think it’s better for dog mess and for people that can’t be bothered to do a bit of gardening. It’s clearly not for the look because no one has ever said “wow, that fake grass looks even better than the real thing!”