Pat chicken dry with paper towels. Cut into bite size pieces if desired.
In a small bowl, mix soy sauce, honey, brown sugar, rice vinegar, ketchup, sesame oil, garlic, and ginger. Pour over chicken in the Instant Pot. Add 1/4 cup water.
Close the Instant Pot lid and set to Manual / Pressure Cook for 10 minutes. Let naturally release for 5 minutes, then carefully do a quick release.
Mix cornstarch and 2 tablespoons water. Turn Instant Pot to Sauté and stir in cornstarch mixture. Cook 2-3 minutes until sauce is thick and shiny.
Serve over rice or noodles. Sprinkle sesame seeds and green onions on top.