I will defer to others as to the temperature at which to bake pizzas
I will point out that the thing called the thermostat, on a deck oven, I call that a wishostat. You are just wishing the oven is at the temperature selected.
To know what the actual temperatures in your oven you need two thermometers. One should be an oven thermometer which should be hung about half way between the oven deck and the top of the oven to show how much heat is being supplied on the top of the pizza the other is a grill thermometer, its shaped like a hockey puck and sets flat on the deck so you know what your deck temperature is.
George Mills