Set your Instant Pot to "Sauté" mode. Add sesame oil and brown the ground pork, breaking it apart as it cooks.
Add garlic powder, onion powder, chili powder, salt, and black pepper. Stir to combine.
Add sliced leeks and cook until slightly softened.
Stir in soy sauce.
Add cauliflower rice on top of the pork mixture. Do not stir.
Close the lid and set to "Pressure Cook" on high for 1 minute.
Once done, use quick release. Open the lid and carefully drain any excess liquid.
Add 1/2 cup cream cheese, 1/2 cup shredded cheddar cheese, and 1/4 cup grated parmesan cheese to the pot. (We save the other half of shredded cheddar to top later.)
Gently fold the cheeses into the cauliflower rice and pork mixture until well combined.
Sprinkle the remaining cheddar cheese on top.
Close the lid (without sealing) and let sit for 2-3 minutes until the cheese melts.
Sprinkle the remaining shredded cheddar and close the lid one last time to melt it on top. Cook for 1 more minute.
Serve immediately or save in an airtight container for later.