Instant Pot Chicken Pot Pie

Ingredients

• 1 1/2 cups chicken broth
• 3 medium potatoes, cubed
• 1 small yellow onion, diced
• 3 chicken breasts
• 1 tsp garlic powder
• 1 tsp celery salt
• 1 tsp salt
• 1/2 tsp pepper
• 2 cups frozen mixed veggies (carrots, peas, corn, beans)
• 1/2 cup milk
• 1 tbsp butter
• 1 tbsp flour