In a small bowl, add orange marmalade, rice wine vinegar, soy sauce, garlic powder, and ginger; mix together using a fork until well combined.
Spray slow cooker with non stick spray, then add chicken to the slow cooker. Pour the orange mixture over the top of the chicken and lightly mix to coat.
Cover and cook on low for 8 hours on low, or 6 hours on high. Remove chicken from slow cooker and shred. Add back to slow cooker and stir to coat with orange sauce.
Serve chicken alongside lettuce wraps and sesame seeds and green onions to garnish. Enjoy!