Turn on the instant pot and select sauté.
Add garlic, ginger, oil, cumin seeds and sauté for 30 seconds.
Add spices and onions and sauté for 3 minutes.
Add chicken broth, chicken breasts and tomatoes in the instant pot.
Press Cancel and close the lid.
Set instant pot to Manual at high pressure and cook for 7 minutes. Release the pressure quickly through steam vent.
Open the lid of the instant pot.
Add coconut milk and select sauté.
Stir in lemon juice and let it simmer for 5 minutes.