Add the onion, sweet potato, pumpkin, tomato sauce, honey (if using), chicken stock, garlic powder, cinnamon, and salt to 6-quart electric pressure cooker.
Secure the lid, select the manual setting, and set it to high pressure for 8 minutes.
When the pressure cooker timer is done, quick release the pressure.
Add the coconut milk. Using an immersion blender, blend until well combined and very smooth. If you don’t have an immersion blender, carefully ladle the cooked tomato mixture into a blender, working in batches. Make sure the lid is on tightly, cover with a towel, and blend until well combined and very smooth.
Taste and add additional salt if desired.