Saucy Grilled Summer Squash With Chickpeas

Name: Saucy Grilled Summer Squash With Chickpeas
Ingredients: 1 lb. summer squash, cut into 2 pieces; 1 Tbsp. plus ¼ cup extra-virgin olive oil; plus more for drizzling; Freshly ground black pepper; 1½ tsp. Diamond Crystal or ¾ tsp. Morton kosher salt, divided, plus more; 8 oz. mixed mini sweet peppers, stems trimmed, halved; 4 garlic cloves, thinly sliced; 1 tsp. cumin seeds; 1½ lb. cherry or Sun Gold tomatoes (about 4½ cups); 1 Tbsp. paprika; 2 tsp. ground coriander; ½ tsp. ground turmeric; 1 15-oz. can chickpeas, rinsed; Cilantro leaves with tender stems and steamed white rice (for serving); Five 12 metal skewers or bamboo skewers, soaked 30 minutes