Preheat your air fryer to 400°F (200°C).
Slice the chicken breast into 1-inch strips and halve the baby potatoes.
In a medium bowl, toss the chicken and potatoes with 0.5 tbsp of olive oil, dried thyme, garlic powder, sea salt, and black pepper.
Arrange the chicken and potatoes in the air fryer basket in a single layer and cook for 12-15 minutes, shaking halfway through, until the chicken is golden and cooked through.
While the chicken cooks, heat the remaining 0.5 tbsp of olive oil in a skillet over medium-high heat.
Add the sliced cremini mushrooms to the skillet and sauté until they are browned and tender.
Stir in the sliced green onions and fresh parsley during the last minute of sautéing to maintain their brightness.
Plate the air-fried chicken and potatoes alongside the sautéed mushroom mixture and serve immediately.