Know what?
Y'all are free to put whatever you want on pizza but the second any of the items you listed go on it, it's no longer pizza.
It's like the difference between "beef" and "steak". If it is part of a cow, it's beef. But it's only "steak" if it's muscle. If it contains ground up liver or something, it's "beef". And a restaurant can get in trouble for selling it as "steak".
Pizza is crust, red sauce, cheese, and Italian sausage. Those are the mandatory ingredients before you can call it pizza.
The following items are optional:
Mushrooms, other types of sausage, ham, bacon, onions, black olives, green bell peppers, oregano and most spices.
Anything else and it's not pizza. I don't know what it is but it's not pizza. You'll have to name it something different.
Making that the law is going to be the entire platform for my presidential campaign.