Prep the Bok Choy. Rinse the bok choy thoroughly under running water to remove any dirt or grit. Pat dry with a paper towel to ensure crispiness. If using regular bok choy, cut into halves or quarters. For baby bok choy, leave them whole or slice them in half lengthwise.
Season. In a bowl, toss the bok choy with olive oil (or sesame oil), soy sauce, garlic powder, salt, and black pepper. Make sure each piece is evenly coated.
Preheat the air fryer to 375°F. Arrange the bok choy in a single layer in the air fryer basket, leaving space for air circulation. Air fry for 5-7 minutes, shaking the basket halfway through, until the leaves are crisp and slightly charred on the edges.
Serve & Enjoy. Remove from the air fryer and garnish with red pepper flakes, sesame seeds, or a drizzle of extra soy sauce for added flavor.