Mix all marinade ingredients until well blended and smooth. Place chicken thighs in a bag or container and pour half of the sauce over them. Seal and refrigerate for at least two hours so the flavors soak deeply into the meat.
Cook rice according to package instructions while the chicken marinates. Preheat the air fryer to around 400°F and arrange chicken thighs evenly inside. Cook for about 14 minutes total, flipping halfway for even browning.
Slice bok choy lengthwise and heat a pan with a little oil. Cook cut-side down until slightly charred and tender. Add a splash of marinade at the end to lightly coat the vegetables with flavor.
Heat the remaining marinade in a saucepan until it gently simmers. Let it thicken slightly so it turns into a glossy glaze. Keep warm until ready to serve.
Divide cooked rice into serving bowls and slice chicken into bite-size pieces. Place chicken over rice and add sautéed bok choy on the side. Drizzle warm glaze over everything and finish with green onions and sesame seeds.