Heat oil in a pan over medium heat. Add onion, ginger, and garlic. Cook for 5 minutes.
Add mushrooms and cook for 3 minutes.
Add coconut milk, water, seasoning packets, pumpkin, Sriracha, and chicken. Simmer until chicken is fully cooked.
Add Maruchan Ramen Chicken Flavor noodles and cook for 3 minutes.
Divide soup into bowls and top with cilantro.