Heat a large skillet over medium heat and cook the ground beef or turkey for 6 to 8 minutes, breaking it apart as it browns. Drain off excess fat, then add the taco seasoning and water.
Stir and let it simmer for 3 to 5 minutes until thick and glossy, not watery. If using beans or corn, stir them in. Remove from heat and let the filling cool slightly.
Preheat the oven to 400°F. Lightly flour a clean surface and roll the pizza dough into a 10×14-inch rectangle. If the dough springs back, let it rest for 5 minutes, then continue rolling. Cut the dough into two equal rectangles.
Place one dough piece on the surface and sprinkle half of the mozzarella and cheddar over it, leaving a small border. Spread the taco filling evenly on top. Add jalapeños or olives if using, then finish with the remaining cheese.
Carefully place the second dough piece over the filling. Press the edges together firmly with your fingers or a fork to seal.
Mix the melted butter with garlic powder, oregano, paprika, onion powder, and salt. Brush it generously over the dough. Slice into 12 long strips using a pizza cutter. Transfer to a parchment-lined baking sheet, leaving space between each strip. Bake for 15 to 18 minutes until golden brown and the cheese is bubbling.
Let the breadsticks cool for about 5 minutes, then sprinkle with chopped cilantro and serve warm with your favorite dipping sauces.