Add pepper and salt to the chicken and place it in the slow cooker.
Mix the melted butter, pineapple juice, brown sugar, chicken broth, soy sauce, honey, apple cider vinegar, sriracha, garlic powder, ginger, and pineapple in a bowl. Mix well and then pour over the chicken.
Cook on low for 5 hours.
Take the chicken out of the crockpot and set it aside.
Add the cornstarch and 1/4 cup of water into the slow cooker.
Stir in the onion and bell pepper.
Put the chicken back into the crockpot and cook for 1 more hour on high until the sauce thickens and the added veggies are tender.
Add water, coconut milk, and salt to a pan and boil to make the rice.
Stir in the rice, and reduce the heat to low. Cook until the rice is tender.
Take off the heat and stir in the coconut and green onion.