Wrap the sweet potatoes in aluminum foil and bake until soft (around 40 minutes, depending on the exact size of the sweet potato).
When the sweet potatoes are cooked, reduce the oven or air fryer temperature to 350°F.
Spread the chickpeas on a baking sheet or wrack of your air fryer and sprinkle with cumin, garlic powder, and salt. Cook for 5-10 minutes, until crispy. Watch carefully so they don't burn.
Combine all the yogurt sauce ingredients in a small bowl.
Assemble the sweet potatoes. Slice each potato in half and then fill with the chickpeas, lettuce, and pickled red onions. Drizzle with yogurt sauce. Enjoy!