Preheat 3-quart air fryer to 400° for 5 minutes. In 3 batches, spray air fryer basket with cooking spray and place potatoes, cut side down, in basket; air fry 20 minutes or until tender. Cool potatoes 10 minutes; with spoon, leaving ½-inch wall, scoop out inside portion of each potato half (reserve for another use).
Brush both sides of potato halves with oil. In 2 batches, place potato halves, cut side up, in basket and air fry 5 minutes; top with roasted peppers and cheese, and air fry 3 minutes or until heated through and cheese melts.
Serve potato skins topped with yogurt, bacon and onions.