Joe Manganiello was 43 in Zack Snyder's Justice League when he played the character 'Slade Wilson / Deathstroke (uncredited)'.
That was over 3 years ago in 2021.
Today he is 47, and has starred in 30 movies in total, 3 of those since Zack Snyder's Justice League was released.
In Zack Snyder's Justice League, I think Joe Manganiello looks: