Sheet Pan Jambalaya

Name: Sheet Pan Jambalaya
Ingredients: 2 small mixed yellow, orange, and/or red bell peppers, cut into thin slices and slices halved crosswise; 1 (12-oz.) pkg. andouille sausage, sliced; 1 medium-size yellow onion, thinly sliced (3 cups); 1.5 tablespoons chopped fresh thyme; 1 tablespoon olive oil; .5 teaspoon garlic powder; 2 teaspoons Creole seasoning (such as Tony Chachere's), divided; 3 large scallions; 12 ounces jumbo peeled, deveined raw shrimp; 1 (10-oz.) can diced tomatoes and green chiles (such as Rotel), drained; 2 (8.8-oz.) pkg. precooked microwavable white rice