Chicken and Chard Dumpling Soup

Name: Chicken and Chard Dumpling Soup
Ingredients: 2 tablespoons olive oil, divided; 1 10-oz. pkg. frozen cauliflower gnocchi; 1 yellow onion, chopped; 1 ¼ teaspoons kosher salt, divided; 2 cloves garlic, finely chopped; 1 pound frozen boneless, skinless chicken breasts; 1 10-oz. pkg. frozen cut Swiss chard, spinach, or other leafy green; 1 strip lemon zest, plus lemon wedges for serving; 1 2-to-3-in. Parmesan cheese rind, plus grated cheese for serving; 1 dried bay leaf; Freshly ground black pepper