Using Saute setting on Instant Pot, heat olive oil and saute onions and pork until pork is no longer pink, about 5 minutes.
Add garlic and cook for about 1 minute.
Add chili powder and oregano and stir to combine with pork.
Add crushed tomatoes, tomato sauce, beans, corn, and maple syrup.
Turn Instant Pot to Slow Cook function on high. Cover pot with a lid and cook for 1 hour or more, stirring occasionally.