Actually, lots of people born in the early 20th century knew they were gay. And for thousands of years cultures across the globe have had places for people who were not binary gendered.
On 600 years of Thai "ladyboys"
https://theculturetrip.com/asia/thailand/articles/a-brief-history-of-thailands-transgender-community/
The traditional 3rd gender in Oaxaca:
https://www.bbc.com/travel/article/20181125-the-third-gender-of-southern-mexico
The priests of the West Asian goddess Cybele, and . . . (from Wikipedia)
"In cultures with a third or fourth gender, these genders may represent very different things. To Native Hawaiians and Tahitians, Māhū is an intermediate state between man and woman, or a "person of indeterminate gender".[4][better source needed] Some traditional Diné Native Americans of the Southwestern US acknowledge a spectrum of four genders: feminine woman, masculine woman, feminine man, and masculine man.[5] The term "third gender" has also been used to describe the hijras of India[6] who have gained legal identity, fa'afafine of Polynesia, and sworn virgins.[7] A culture recognizing a third gender does not in itself mean that they were valued by that culture, and often is the result of explicit devaluation of women in that culture.[8]"
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Bottom line: gender variance is not a new or exclusively "woke" concept. It's traditional, appears all over the globe, and has some fascinating scientific underpinnings.