In a small bowl, whisk together the honey, soy sauce and rice vinegar. Stir in the chopped garlic, and set aside
Pour the olive oil into your pressure cooker, and place the chicken into the pot
Season with sea salt and garlic powder. Pour the honey garlic sauce over the chicken, and add the ketchup, but don't stir
Place the lid on your Instant Pot, make sure the valve is at sealing position, and hit PRESSURE COOK for 8 minutes. Pot will take a few minutes to reach pressure, then will begin counting down
When pot beeps, allow an 8 minute slow release, then move the valve to release remaining pressure. When pin drops, carefully remove lid
Remove chicken to a platter, slice and cover to keep warm.
Hit SAUTE on the pressure cooker. Mix cornstarch and soy sauce in a small bowl until well combined. When sauce bubbles, slowly whisk slurry into sauce, and allow to simmer for a minute or until it starts to thicken
Stir chopped broccoli into sauce. When it starts to soften, turn SAUTE feature off, and add chicken back to pot. Serve immediately