Laws designed to protect workers are pretty rarely enforced, or only through costly legal proceedings that most working class people can’t afford.
Labor disputes are handled through state and federal labor relations boards. You file a complaint, an investigation is started, and eventually a ruling is made. Lawyers are not a requirement but the employer will probably send one anyway.
>Labor disputes are handled through state and federal labor relations boards.
...which are toothless, especially in Republican-controlled states.