Turn on the Instant Pot and select the 'Sauté' mode.
Add the coconut oil to the pot, and once melted, add the diced onion. Sauté for 3-5 minutes until the onion is soft and translucent.
Add the minced garlic and ginger, and sauté for another 1-2 minutes until fragrant.
Stir in the cumin seeds, coriander powder, turmeric powder, and garam masala. Cook for 1 minute to toast the spices.
Pour in the coconut milk and mix well, scraping any browned bits from the bottom of the pot.
Add the cauliflower florets, diced carrots, green peas, and red bell pepper. Stir to combine.
Add the soy sauce or tamari and season with salt to taste.
Close the lid of the Instant Pot, set the valve to 'Sealing,' and select the 'Manual' or 'Pressure Cook' mode. Cook on high pressure for 5 minutes.
Once cooking is complete, allow the pressure to release naturally for 10 minutes, then carefully release any remaining pressure.
Open the lid, stir the korma gently, and garnish with fresh cilantro.
Serve hot over basmati rice or with naan.