Place sour cream, chilies, cilantro and lime juice in a food processor; cover and process until blended. Set aside.
Cut each tilapia fillet lengthwise into 2 portions. Place flour, egg white and bread crumbs in separate shallow bowls. Dip tilapia in flour, then egg white, then crumbs.
Preheat air fryer to 400°. In batches, arrange fillets in a single layer on greased tray in air-fryer basket; spritz with cooking spray. Cook until fish flakes easily with a fork, 10-12 minutes, turning once.
Combine seasonings; sprinkle over fish. Place a portion of fish on each tortilla; top with about 2 tablespoons sour cream mixture. Sprinkle with tomato. If desired, top with additional cilantro.