Food (or the lack thereof) is a recurring theme in Severance. The reason for the lack of food in the series is not yet known, but there are certain quotes in the series that can give insight on the role of food in the Severance Universe.

I was saying, my friend in Lima hasn’t had a food-based dinner event in…

— Patton, (43:23)

At events at which people are not consuming food, they do however, often have water available to them, as can be seen at the Dinnerless Dinner Party and Alexa's dates with Mark.