Start by combining chicken ingredients in a slow cooker or Instant Pot. Cook for 3-4 hours on high in a slow cooker or 15 minutes on pressure cook in an Instant Pot until the chicken can be easily shredded with a fork.
Spread the shredded chicken onto a foil lined baking sheet. Pour over some of the bbq sauce mixture to ensure chicken doesn't dry out while broiling. Broil for about 5 mins until chicken gets slightly blackened crispy edges.
Slice the sliders horizontally and toast the undersides in the broiler until golden. Spread the tops with melted butter and sesame seeds then toast top side for 1 min.
Pour most of the white sauce over ~2 cups of coleslaw mix until it's well coated, reserving a 1/3 cup for drizzling over sliders.
Spread coleslaw over bottom buns, top it w/ chicken, drizzle remaining sauce, thinly sliced red onions, and chips - barbecue, regular, sour cream & onion all work. Slice into sliders and enjoy!