The verb to cover has lots of meanings: to lay something over something else, to apply a surface layer onto something, to make a new recording of another performer’s song, to protect, to match in value, even to copulate (said of horses, usually). Over the last five years I’ve noticed an emerging sense: “to appear on the cover of a magazine.”
So far, I’ve seen cover in this sense only in fashion and celebrity journalism, with veteran style bloggers Tom and Lorenzo in the vanguard.
Here’s an example from November 2017: “Ruth Negga covers @BazaarUK”
And here’s an example from this week from Elle magazine: “Gisele Bündchen covers ELLE’s October 2022 issue.”