In a shallow bowl, combine orange juice & zest, soy sauce, rice wine vinegar, garlic, ginger, olive oil, honey, and red pepper flakes. Pour half the mixture into a medium sized mixing bowl.
Place the salmon, skin side up, in the shallow bowl and place the mushrooms in the medium sized mixing bowl. Spoon the marinade over the mushrooms to cover them and marinate both the salmon and the mushrooms for 30 minutes.
Preheat the air fryer to 400° F. Place the salmon in the air fryer basket skin side down and arrange the mushrooms around the salmon. Cook 8-10 minutes. To serve, drizzle some of the remaining marinade from the mushroom bowl and garnish with scallions and sesame seeds.