Set the Instant Pot to the sauté function. If using olive oil, add it to the pot and heat for about 1 minute. If you want to skip the oil, you can sauté the vegetables in a small amount of water.
Add the diced onion, carrots, and celery to the pot. Sauté for about 5 minutes, until the vegetables are softened.
Stir in the minced garlic and sauté for an additional 1 minute until fragrant, being careful not to burn it.
Add the chopped cabbage to the pot, along with the diced tomatoes (including their juice), vegetable broth, dried thyme, smoked paprika, and ground cumin. Stir well to combine.
Secure the Instant Pot lid and set the valve to the sealing position. Select the 'Soup' setting or manual pressure cook for 10 minutes.
Once the cooking time is complete, allow the Instant Pot to release pressure naturally for 10 minutes, then switch the valve to venting to release any remaining pressure.
Carefully remove the lid, and season the soup with salt and pepper to taste. Give it a good stir.
Serve hot, garnished with fresh parsley if desired.