It's a mod for Cyberpunk 2077, is an add-on that adds a new pair of pants to the game, called Leggings Black Latex. The pants are also a bit stretchy, so they fit the female V's body shape. The pants are not a standard item in the game, but they are added as an add-on, which means that they can be added and removed at any time.

This modification to the game is designed to be simple and easy to use, so it is not a complicated process to create it.