Preheat your oven to its highest setting, ideally 500F, with a pizza stone or steel inside for at least 30 minutes.
Whisk together the heavy cream, cream cheese, ground Szechuan peppercorns, garlic, and soy sauce until smooth.
Stretch the pizza dough into a 12-inch round on a lightly floured surface or pizza peel.
Spread the Szechuan cream base evenly over the dough, leaving a half-inch border. Scatter the mozzarella on top.
Bake for 10-12 minutes, until the crust is deeply golden-brown and the cheese is fully melted and bubbling.
Remove from the oven and immediately scatter the crab meat over the hot pizza. Drizzle with chili oil, top with green onions and sesame seeds, and slice.