Turn the Instant Pot to the Sauté setting. Add the sesame oil and let it heat up.
Add the minced garlic and ginger, sautéing for about 1 minute until fragrant.
Place the chicken thighs into the pot, browning them on each side for about 3-4 minutes.
Pour in the chicken broth and soy sauce, ensuring the chicken is fully submerged. Close the lid and set the Instant Pot to Manual mode on high pressure for 10 minutes.
Once the cooking time is complete, do a quick release of the pressure. Carefully remove the chicken and shred it using two forks.
Return the shredded chicken to the pot, and add in the sliced mushrooms, coconut milk, and ramen noodles. Stir well to combine.
Close the lid again and set to Manual mode for another 3 minutes.
After the timer goes off, release the pressure again. Add the baby spinach, lime juice, and season with salt and pepper to taste. Stir until the spinach wilts.
Serve hot, garnished with sliced green onions on top.
Notes
Feel free to add other vegetables or adjust seasonings to taste.