Remove giblets and pat the chicken and cavity very dry. Confirm it fits the cold basket with safe clearance.
Mix salt, paprika, garlic, onion, thyme and pepper. Rub chicken with oil and the seasoning.
Tuck wing tips, loosely tie legs if desired and place lemon and garlic loosely in the cavity.
Preheat the air fryer to 360°F if recommended.
Cook breast-side down at 360°F for 30 minutes.
Turn breast-side up carefully and cook for 20 minutes more.
Check the thickest breast and inner thigh. Continue in 4- to 5-minute intervals until both reach at least 165°F.
Brown at 390°F for 2 to 4 minutes only if needed. Rest uncovered for 10 to 15 minutes before carving.