Place chicken in the Instant Pot.
In a bowl, whisk together soy sauce, honey, rice vinegar, garlic, and ginger. Pour over the chicken.
Seal the lid and cook on high pressure for 10 minutes. Let pressure release naturally for 5 minutes, then quick release.
Remove chicken and shred or cut into chunks.
In a small bowl, mix cornstarch and water. Turn Instant Pot to sauté mode, stir in slurry, and cook until sauce thickens.
Return chicken to the pot and toss with sauce.
Serve hot over rice. Garnish with sesame seeds and green onions.