Season thighs with salt and pepper. Use the sauté function on the Instant Pot and brown thighs skin-side down 4–5 minutes; flip and brown 2 minutes. Remove and set aside.
Add oil, garlic, and ginger; sauté 30 seconds until fragrant. Stir in soy sauce, honey, vinegar, ketchup, and broth, scraping browned bits.
Return thighs to the pot skin-side up. Seal and cook on high pressure for 10 minutes, then quick release after 5 minutes of natural release.
Remove thighs to a platter. Switch to sauté, whisk in cornstarch slurry, and simmer 2 minutes until sauce thickens and glazes.
Spoon sauce over thighs and garnish with sesame seeds and green onions. Serve with rice or steamed veggies.