Heat grill to medium-high. Season the pork chops with ¾ teaspoon salt and ¼ teaspoon pepper. Grill until cooked through, 7 to 8 minutes per side.
Meanwhile, in a large bowl, toss the sweet potatoes with 1 tablespoon of the oil and ¼ teaspoon each salt and pepper.
Place the potatoes on the grill, reserving the bowl. Cook, turning often, until tender and slightly charred, 10 to 12 minutes.
To the reserved bowl, add the syrup, scallions, remaining tablespoon of oil, and ¼ teaspoon each salt and pepper.
Add the sweet potatoes and toss to coat. Serve with the pork.