Pork Soup Dumplings

Name: Pork Soup Dumplings
Ingredients: 3 cups all-purpose flour, plus more for dusting; Kosher salt; 1 3/4 cups chicken stock; 1 tablespoon soy sauce; 1 1/4-ounce envelope gelatin powder (about 1 tablespoon); 1 pound ground pork; 2 tablespoons soy sauce, plus more for serving; 1 tablespoon finely grated fresh ginger; 1 tablespoon sambal oelek, plus more for serving; 1 tablespoon toasted sesame oil; 1 tablespoon rice vinegar, plus more for serving; 4 scallions, finely chopped