There’s a few variables here you’re going to need to address, but to tackle the easy part first, yes you will need to increase other ingredients as well, as long as you keep the ratio of all the ingredients consistent, you can pretty much scale the recipe up or down however much you want.

Next, what is your definition of an XL pizza? Different stores have different sizes. At the local pizza place I used to work at many years ago, our small was a 12 inch, medium 14, large 16, and we used 18 inch pies we’d use to sell individual slices on for some catering gigs. Some places max out at 12 or 14 inches, and I’ve seen some places that offer 20 inch pies, and if we venture into the realm of rectangular pizzas they may be made in a full 18x26 sheet pan (I’m going to assume you’re not doing that though, because most residential ovens can’t even fit a full sheet pan, and if you have a professional oven that can you probably already know what you’re doing and wouldn’t need to ask)

What style of pizza are you trying to replicate? What recipe are you using? What kind of oven? What is your technique like? Different doughs will stretch or rise differently or behave differently in the oven. There’s no real one-size-fits-all rule of thumb to follow.

You can do a bit of math, figure out your dough density, volume of a cylinder that’s say 16 inches in diameter and ⅒ of an inch thick, and scale your recipe from there, but honestly making pizza at home is often going to involve a bit of trial and error no matter what while you dial in your technique and equipment, so personally I’d just make a bigger batch of dough, eyeball out a ball that seems about right, weigh it and see how it comes out, if it’s too small make a second pizza with a bigger ball of dough, if it’s too big, make the next one smaller, until you figure out what’s right for the pizza you want to make. Invite a couple friends over to eat the extra pizzas and make a night of it.