When I make pizza dough, I have nothing to proof.
I've made thousands of pizzas and I've never had the yeast fail. So I don't proof my yeast when I make pizza dough. In fact, the only way it might fail is by proofing it with water that's hot enough to kill the yeast.
So I just add the yeast to the flour, salt and water and turn out authentic pizza that elicits pleas for dinner invitations.