All ten players played a part if you watch the full sequence.
Gravy didn't "win" the ball. He kept possession going from a loose pass from Elliott (I think it was).
View: https://x.com/SamueILFC/status/1960226082109411336?s=19
Ironically the only outfield player not to touch the ball in the whole move was Szoboszlai, who probably had the second most crucial part in it after Rio's finish