Stir together 2 Tbsp. oil, the lemon juice, salt, and pepper in a large bowl. Add fish and toss to coat. Heat remaining 1 Tbsp. oil in a large skillet over medium-high heat. Add onion; sauté until golden, about 8 minutes, then transfer to a plate.
Remove fish from marinade, discarding marinade, and pat fish dry with paper towels. Transfer fish to hot skillet over medium-high heat; brown 1 minute on each side, then remove from skillet.
Add flour to skillet; cook, stirring, over medium-high heat until lightly browned. Stir in wine, chickpeas, onion, tomatoes, chili’s and half of parsley. Simmer until slightly thickened, 2 to 3 minutes. Return fish to skillet; cook until it flakes easily with a fork, about 1 minute. Serve with remaining parsley, lemon zest, and lemon wedges.
Serve over lemon dill rice.