Oh man, my buddy got stuck in that same rut last month. He started air frying everything plain, just chicken and broccoli every night. Then his wife tried tossing some cauliflower in buffalo sauce and a little bit of flour before air frying it. He said it was like eating bar food but way less guilt, totally broke the cycle for them. Maybe mess around with sauces and different veggie coatings like that.
Try making black bean burgers with a tablespoon of barbecue sauce mixed into the patties. It adds a sweet, smoky flavor that changes up the usual chicken or fish routine. Just spray the basket with oil so they don't stick.