Smothered Pork Chops in Potlikker Gravy

Name: Smothered Pork Chops in Potlikker Gravy
Ingredients: 1½ cups (or more) Country Ham Potlikker; 2 Tbsp. distilled white vinegar; 2 Tbsp. Worcestershire sauce; 1 tsp. Dijon mustard; 1 tsp. ground allspice; 1 tsp. mild-flavored (light) molasses; ⅓ cup all-purpose flour; 4 1–1½-thick bone-in pork chops; Kosher salt, freshly ground pepper; ⅓ cup vegetable oil; 2 medium onions, thinly sliced; 6–8 garlic cloves, finely chopped; 1 Tbsp. finely chopped marjoram; 1 Tbsp. finely chopped rosemary; 1½ tsp. finely chopped thyme, plus leaves for serving