Bring 3 cups water to a boil in a teapot or small saucepan over high; remove from heat. Add tea bags, coconut milk, and lime juice; cover and steep 5 minutes. Remove and discard tea bags; stir in salt and fish sauce. Bring just to a simmer over medium. Remove from heat. Divide chickpeas and orzo evenly between 2 bowls. Pour hot tea mixture evenly into bowls; serve immediately with lime wedges and desired toppings.