On a cutting board, cut each chicken breast into about ten pieces.
Add the chicken chunks to a medium-deep bowl and lightly season with some salt and pepper. Next, toss the chicken, melted butter, and olive oil using tongs until evenly coated.
In another medium bowl or rimmed plate, whisk together the bread crumbs, salt, black pepper, and garlic powder.
Preheat the Air Fryer to 400 degrees.
Working with a few chicken pieces at a time, coat the nuggets in the breadcrumb mixture until coated on all sides. Transfer to a plate until the air fryer is heated.
When the Air Fryer is hot, add the chicken nuggets in a single layer to the tray. Set the air fryer to 400 degrees for 8 minutes, and flip the nuggets after 4 minutes.
Serve immediately and garnish with parsley if desired. Serve with ketchup or your favorite condiment for dipping.