Chop shrimp into ½-inch pieces and pat dry with paper towels. Halve bell peppers lengthwise, remove seeds and membranes, then arrange cut-side up in air fryer basket with 1 inch space between each half.
1 lb shrimp, 4 medium bell peppers
Combine softened cream cheese, chopped shrimp, drained crab meat, minced garlic, diced onion, lemon juice, and chopped parsley in a mixing bowl. Stir until evenly mixed but do not overmix; visible chunks of seafood should remain.
8 oz crab meat, 0.5 cup onion, 3 cloves garlic, 8 oz cream cheese, 1 tbsp lemon juice, 2 tbsp parsley
Spoon stuffing mixture into each pepper half, filling to just below the rim. Pack gently with the back of a spoon so stuffing holds together but avoid compressing flat or dense.
Mix breadcrumbs with grated parmesan and sprinkle one tablespoon over each stuffed pepper. Set air fryer to 350°F and cook for 12-15 minutes until shrimp turns opaque, peppers soften at edges, and breadcrumb topping turns golden brown.
0.25 cup parmesan cheese, 0.5 cup breadcrumbs
Let stuffed peppers sit in the basket for 5 minutes after cooking to allow stuffing to set and prevent spilling when plating. Transfer to plates with a spatula and serve immediately while topping stays crisp.