Your age group tends to look younger than expected, younger groups look like perpetual babies, and older generations look like perpetual adults/old timers.

I think plenty of Gen Z kids look really old for their age. For celebrities, Sabrina Carpenter and Millie Bobby Brown look older than I think most Millennial celebrities did at the same age.

And with regular people who I work with, the twenty-somethings don't look that young to me. Fashion and style might be part of it, but even skin and hair and overall appearance seem older to me than many millennials I know. Maybe it's rates of smoking/vaping, maybe it's other substances, maybe it's sleep or sunlight or obesity.

But my unscientific observation is that I think people born around 1990 have always appeared younger, longer.