Pat pork chops dry with paper towels and season both sides with salt and black pepper.
In a medium bowl, whisk together pineapple juice, soy sauce, minced ginger, minced garlic, brown sugar, and red pepper flakes.
Heat vegetable oil in a large skillet over medium-high heat until shimmering.
Place pork chops in the skillet and sear for 4 minutes per side until a golden-brown crust forms.
Remove pork chops from the skillet and set aside on a plate.
Pour the pineapple juice mixture into the hot skillet, scraping the bottom with a wooden spoon.
Add the fresh pineapple chunks to the skillet and simmer for 5 minutes until reduced.
Whisk the cornstarch and cold water to create a slurry, then stir it into the simmering sauce.
Return the pork chops to the skillet and spoon the glaze over the meat.
Continue cooking for 1-2 minutes until the internal temperature reaches 145°F (63°C).
Allow the pork chops to rest for 3 minutes before serving.