Cook pork in a large pot or Dutch oven over medium heat, breaking up into chunks with a wooden spoon, until cooked through, about 5 minutes. Transfer pork to a bowl; reserve drippings in pot. Drippings should measure about 1 tablespoon, if not, add a splash of oil.
Heat drippings over medium. Add onion and 2 teaspoons kosher salt; cook until softened and translucent, 5–8 minutes. Stir in garlic, curry powder and pepper flakes; cook 1 minute.
Stir in sweet potatoes then add coconut milk and 3 cups water; bring to a boil over high, then reduce to a simmer and cook until potatoes are nearly tender, 8–10 minutes.
Stir in kale, chickpeas and reserved pork; cook until warmed through and kale has wilted, about 2 minutes. Season with additional salt and red pepper flakes to taste.
Top servings with yogurt, cilantro and additional red pepper flakes.