The Brief: "New X unlocked" is a phrase used online to refer to glow-ups and other upgrades as if they are in a video game.

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Internet users are referring to glow ups and other impressive upgrades as being “unlocked” as if they are part of a video game.
Common phrases include “new level unlocked,” “new character unlocked,” as well as “new (X) unlocked” which would see an individual insert the name of whoever they’re referring to. The phrase is often accompanied by an open lock emoji.

https://twitter.com/yfhinaa/status/1363240865347551242?s=21
new character unlocked pic.twitter.com/drsJYBMrri
— v (@veranialrojas) February 23, 2021
The phrase is also used as a meme in reference to new discoveries.
new insecurity unlockedπ
— celina (@tortelini__) February 22, 2021
NEW LEVEL OF THE COUCH UNLOCKED pic.twitter.com/JWgkLqGK4S
— CRIME LORD VERN (@Mist3rVern) February 19, 2021