Wash and rinse the chicken thighs with cold water, then pat them dry with paper towels. Season the chicken thighs with salt and pepper and set aside. In a separate bowl, mix all the ingredients for the Sauce together, stirring until well combined. Ensure that the honey and cornstarch are completely dissolved. Set aside.
Turn on the Sauté mode on your Instant Pot. Once the pot is fully heated (to prevent the chicken from sticking), add the cooking oil. Pan-sear the chicken thighs until they turn slightly brown. If they stick too much, you can use a non-stick skillet for pan-searing or skip this step.
Add the garlic and sauté for a minute. Pour in the sauce and top with white sesame seeds. Cover the pot, select Manual, and set it to High Pressure for 8 minutes.
When it beeps, turn to Quick Release. Once the valve drops, carefully remove the cover, add the chopped scallions, and serve immediately. Set the Instant Pot to Sauté mode to reduce the sauce for about 2 minutes, or until it slightly thickens.
If the sauce is lighter in color than shown in the pictures, you might consider adding some dark soy sauce to achieve a deeper color. Different soy sauces have varying colors; some are lighter, while others are darker. If you use a lighter soy sauce, the sauce will appear lighter, but the taste should remain about the same.