Shrimp Chowder with Herb Drop Biscuits

Name: Shrimp Chowder with Herb Drop Biscuits
Ingredients: Cooking spray, for baking dish; 4 slices bacon, chopped; 6 scallions, sliced; 1 fennel bulb, cored and chopped; 4 garlic cloves, chopped; 5 tbsp. all-purpose flour; 1 3/4 c. chicken stock; 2/3 c. heavy cream; 1 1/4 c. frozen corn kernels, thawed; 1 tbsp. Chopped fresh dill; kosher salt; Freshly ground black pepper; 1 lb. peeled and deveined medium shrimp, coarsely chopped; 1 1/4 c. (spooned and leveled) self-rising flour; 1 tsp. baking powder; 2 tbsp. chopped fresh flat-leaf parsley; 1 chopped scallion; 1/4 c. unsalted butter, chilled; 1/2 c. buttermilk