Prepare rice according to package directions
In a bowl, whisk together buttermilk and egg, add chicken chunks and coat them in egg mixture
Place flour, cornstarch, salt and pepper in a ziploc bag
Remove chicken from egg mixture (shake it off) and place into bag with flour. Shake so all chicken is lightly coated.
Shake off chicken and place in air fryer in a single layer, not touching
Spray with a good amount of olive oil
Air fry at 375 for 4 minutes
Turn chicken pieces and spray with olive oil and air fry 4 additional minutes
While chicken is air frying, heat skillet to medium high heat and add olive oil and minced garlic
Saute garlic for one minute
Grate orange with microplane into skillet. Add orange juice, hoisin, bbq sauce, honey, cayenne and sugar and bring to a boil.
Boil for 3 minutes, stirring constantly. Reduce heat and simmer 1-2 minutes until sauce thickens, stirring frequently
Remove sauce from heat
Remove chicken bites from air fryer and add to skillet.
Coat each bite with sauce and then - using tongs - put chicken back into air fryer in a single layer
Air fry at 400 for 4 minutes
In serving bowls, place rice in each bowl. Top with orange chicken and diced cilantro and green onion.