Instant Pot barley minestrone soup

Ingredients

• 2 celery stalks , chopped
• 2 carrots , chopped
• 1 onion , chopped
• 1 796-mL can diced tomatoes
• 3/4 cup pearl barley , rinsed
• 2 tsp Italian seasoning
• 2 bay leaves
• 1 1/2 tsp salt
• 1/2 tsp pepper
• 1 900-mL carton no-salt-added vegetable broth
• 1 540-mL can no-salt-added black beans , drained and rinsed
• 8 cups torn kale
• 1/3 cup store-bought basil pesto
• 1/2 cup finely grated Parmesan
• olive oil , optional