Instant Pot Matzo Ball Soup

Name: Instant Pot Matzo Ball Soup
Ingredients: For the Soup; 2 1/2 pounds chicken thighs (with bone and skin); 2 quarts water; 4 ribs celery (with leaves, cut into 2-inch lengths); 1 onion (large, chopped); 4 carrots (peeled, cut into 1-inch chunks); 4 cloves garlic (peeled and smashed); 4 sprigs parsley; 1 bay leaf (large, or 2 small leaves); 2 teaspoons kosher salt (or to taste); Black pepper (freshly ground, to taste or as desired); Optional: fresh chopped dill leaves or parsley, for garnish; For the Matzo Balls; 3 large eggs; 3 tablespoons vegetable oil (or chicken schmaltz or duck fat); 3/4 cup matzo meal; 3/4 teaspoon salt; 1 teaspoon baking powder; Optional: 1 tablespoon chopped fresh parsley