Do you want to wrap the steamed vegetables in the steamer with plastic wrap?
You can add it or not, depending on what steaming method you have. If it is dry steaming, it must be covered or covered with plastic wrap. If it is steamed with powder, you can add plastic wrap at will. Adding plastic wrap is afraid that it won't taste good in water, depending on your personal needs. Chefs in restaurants usually add plastic wrap, but I personally feel unsafe and never use plastic wrap.