More people using sunscreen and lotion on the regular prevents skin damage. More people are eating healthy, working less physically demanding jobs. Also there's a pretty huge bias with seeing pictures of older people and seeing them as older than they actually look. It has to do with seeing older styles of clothing and how people tend to keep their core styles longer. This makes people in the present see past photos as "older people" regardless of how young the faces look.
Also the microplastics are preserving us from the inside out. We're all deli-wrapped now.