Spread a thin layer of mustard on each pork schnitzel. In a shallow dish, mix the paprika powder with the flour. Coat each schnitzel in the paprika-flour mixture, then place on a wire rack and allow the coating to set completely.
Heat the oil in a large pan over medium-high heat. Add the bacon and diced onions and fry until the bacon is crispy and the onions are softened. Remove with a slotted spoon and set aside. In the same pan with the fat remaining, fry the schnitzel for 2-3 minutes on each side over medium-high heat, then reduce to low heat and continue frying for about 4 minutes until the internal temperature reaches 63°C (145°F). Return the bacon and onions to the pan and stir gently for about 1 minute until heated through.
Serve the schnitzel topped with the bacon and onions.