Easy Instant Pot Chicken Tortilla Soup

Name: Easy Instant Pot Chicken Tortilla Soup
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: Mexican
Ingredients: 1 medium yellow onion; 4 cloves garlic; 1 tablespoon olive or vegetable oil; About 1 pound boneless, skinless chicken thighs (3 to 4); 3/4 teaspoon kosher salt, plus more as needed; Freshly ground black pepper; 1 teaspoon chili powder; 3/4 teaspoon ground cumin; 1/2 teaspoon dried oregano; 3 cups low-sodium chicken broth; 1 (14.5-ounce) can diced tomatoes with green chiles or fire-roasted diced tomatoes with green chiles; 1 (about 15-ounce) can black beans; 1 1/4 cups frozen corn kernels; Topping options: fresh cilantro leaves, shredded Monterey or colby jack cheese, diced avocado, lime wedges, thinly sliced scallions; 3 (about 6-inch) corn tortillas; 1 1/2 cups vegetable oil (if deep frying) or cooking spray (if air frying or baking); Kosher salt