It might be too broad to say any whole industries are exempt from FLSA. However, non-employees (meaning freelance or independent contract workers) are clearly not covered under FLSA. Additionally, some truck drivers, agricultural workers, railroad workers, and other exemptions can be explored in this article. (https://hrdailyadvisor.blr.com/2020/10/27/who-is-not-covered-by-the-flsa/)