Place the cubed ham and halved baby potatoes in the slow cooker.
In a medium bowl, whisk together honey, brown sugar, Dijon mustard, soy sauce, garlic powder, onion powder, black pepper, and red pepper flakes until well combined.
Pour the honey glaze mixture over the ham and potatoes in the slow cooker, ensuring everything is evenly coated.
Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours, until the potatoes are tender and the ham is heated through.
Once cooked, stir gently to combine and let sit for 10 minutes before serving.
Garnish with chopped fresh parsley before serving.