Spray the inside of the Instant Pot with cooking spray. Add all ingredients, except pecans, and stir to mix. Set Instant Pot on Manual high pressure for 3 minutes. Release naturally for 10-15 minutes. While oats are cooking, heat a sauté pan on medium heat. Add pecans to the dry skillet (no oil) and stir occasionally for 3-5 minutes until nuts are fragrant and lightly toasted. Serve oats with pecans, butter and a little extra drizzle of maple syrup, if desired.