Lack of Effort in Appearance

I (f/40) recently returned to an office environment after several years in a non-office environment. I am blown away by the younger girls in my office who seemingly put no effort in their appearance. No makeup, no hairstyle, sloppy dress. It’s not just one but all of them. I’m in no position to ask and it’s not the end of the world but is this normal? When did this happen?