Bring pineapple juice, honey, vinegar, mustard, red pepper flakes, sesame oil, and turmeric to a simmer in a small saucepan over medium heat and cook, swirling occasionally, until reduced to 3/4 cup, 10–15 minutes. Let cool. Transfer half of sauce to a small bowl and set aside for serving.
Prick holes in pork chops and season with salt. Grill over direct heat about 3 minutes per side. Continue to grill, turning several times and basting with sauce, until charred and coated with a thick layer of glaze. Continue grilling until internal temperature is 145°F. Let rest 5 minutes before serving. Serve with reserved sauce alongside.