Easy Sheet Pan Chicken Shawarma

Name: Easy Sheet Pan Chicken Shawarma
Ingredients: 2 tablespoons olive oil; 2 cloves garlic, minced; 1 1/2 teaspoons kosher salt; 3/4 teaspoon freshly ground black pepper; 1/2 teaspoon ground cumin; 1/4 teaspoon ground allspice; 1/4 teaspoon ground cinnamon; 1/4 teaspoon ground turmeric; 2 1/2 pounds boneless, skinless chicken thighs or chicken breast tenders; 6 pita, lavash, or flatbreads; 2 cups shredded romaine lettuce; 1 1/2 cups diced tomato; 1 1/2 cups diced cucumber; Tzatziki , green tahini sauce , or yogurt-dill sauce , for drizzling