A lot of older cameras (and early phones too) would have a small mirror next to the lens, specifically for taking photos like that. The word selfie is kind of recent. The concept of taking a photo of yourself is probably as old as the invention of the camera.
I remember taking such pictures in the '90s and and calling them "autofoto" and I thought I was very clever.
I remember watching a podcast at the time where they were making fun of the word selfie for being an absurd unnecessary word. I remember vehemently agreeing.
In hindsight I don't know wth I was thinking.
Do you guys remember the mid-2000s “MySpace Angle” ? Usually shot in the bathroom.