In a large mixing bowl, combine the shredded chicken, crumbled turkey bacon, halved cherry tomatoes, diced avocado, chopped romaine lettuce, and finely chopped red onion.
In a separate bowl, whisk together the Greek yogurt, mayonnaise, lemon juice, Dijon mustard, salt, and pepper until smooth and well combined.
Pour the dressing over the chicken mixture and gently toss until all ingredients are evenly coated. Adjust seasoning with additional salt and pepper if necessary.
Allow the salad to rest for about 10 minutes to let the flavors meld together.
Serve the salad chilled or at room temperature, garnished with freshly chopped parsley.