In my experience, severance (as part of your employment agreement) is not normal or expected for any job in the USA. I’ve been working for decades and have never seen even a hint of it in any employer’s benefits info. Severance is something only big shot executives get.
I got a severance package from a part time bank teller job after they closed the branch I worked at. I also got a severance package when a small business I worked at went under. I'd say severance packages are a lot more common than you think they are.
