Pat pork chops dry with paper towels and season generously with salt and pepper.
Heat olive oil in a large skillet over medium-high heat. Sear pork chops 3–4 minutes per side until golden brown. Transfer to a plate.
Reduce heat to medium. Add butter, onions, and apples. Cook until softened and lightly caramelized, about 6–8 minutes.
Stir in garlic and cook for 30 seconds.
Add chicken broth, mustard, and thyme. Stir well, scraping up any browned bits from the skillet.
Return pork chops to the skillet. Simmer uncovered for 5–7 minutes, or until pork reaches 145°F (63°C).
Taste sauce and adjust seasoning if needed. Serve warm with the apples and onions spooned over the pork chops.