Instant Pot Hawaiian Pulled Chicken Sandwiches

Name: Instant Pot Hawaiian Pulled Chicken Sandwiches
Cook time: 25 min
Total time: 25 min
Cuisine: American
Ingredients: 1 1/2 pounds skinless, boneless chicken thighs; 1 teaspoon chili powder; Kosher salt and freshly ground black pepper; 2 tablespoons extra-virgin olive oil; 1 small red onion, chopped; 2 cloves garlic, minced; 1/3 cup pineapple preserves; 2 tablespoons plus 2 teaspoons yellow mustard; Pinch of cayenne pepper; 1 teaspoon apple cider vinegar; 6 hamburger buns, lightly toasted; 1 14-ounce bag shredded coleslaw mix; 1 red bell pepper, thinly sliced; Kosher salt and freshly ground black pepper; 2/3 cup unsweetened coconut flakes, toasted; 1 scallion, thinly sliced; 1/4 cup chopped fresh cilantro; 1/3 cup mayonnaise; 2 tablespoons apple cider vinegar; Vegetable chips, for serving