In a large mixing bowl, combine the cooked chicken, cooked pasta, cherry tomatoes, cucumber, red bell pepper, red onion, and thawed peas.
In a separate small bowl, whisk together mayonnaise, Greek yogurt, apple cider vinegar, Dijon mustard, honey, and garlic powder until smooth to create the dressing.
Pour the dressing over the pasta mixture and gently toss until all ingredients are well coated.
Season with salt and pepper to taste, then sprinkle with fresh parsley.
Chill the salad in the refrigerator for at least 1 hour before serving to allow flavors to meld together.