Some of the pictures people see of the big book burning fests that happened in Germany in the 1930s weren't generalized events. One of them was the Nazis specifically destroying the works of Magnus Hirschfeld, who ran the Institute for Sexual Research, that studied sexuality and gender issues and provided the earliest instances of gender affirming care. They sacked the institute, destroyed it, and burned all of the material there.

https://en.wikipedia.org/wiki/Magnus_Hirschfeld

This is to say: trans people have always been here. And nearly a century later, the destruction of this institute has been widely forgotten.