there will absolutely be gays and trans people.

True, homosexuality isn’t going away. However, while I would rate it as quite unlikely, I could imagine a world where sodomy laws returned, social norms changed, and homosexuality became a taboo again. There have been places and times in human history where the acceptability of homosexuality have varied quite a bit. I don’t think that social norms on homosexuality are really tightly linked to technology or something where there’s a clear “arrow” driving in one direction over time.

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

Societal attitudes towards same-sex relationships have varied over time and place. Attitudes to male homosexuality have varied from requiring males to engage in same-sex relationships to casual integration, through acceptance, to seeing the practice as a minor sin, repressing it through law enforcement and judicial mechanisms, and to proscribing it under penalty of death. In addition, it has varied as to whether any negative attitudes towards men who have sex with men have extended to all participants, as has been common in Abrahamic religions, or only to passive (penetrated) participants, as was common in Ancient Greece and Ancient Rome. Female homosexuality has historically been given less acknowledgment, explicit acceptance, and opposition.

Homosexuality was generally accepted in many ancient and medieval eastern cultures such as those influenced by Buddhism, Hinduism, and Taoism.[1][2] Homophobia in the eastern world is often discussed in the context of being an import from the western world,[3][4] with some contending that definitions of “progress” on homosexuality (e.g. LGBT rights) as being Western-centric.[5]

I mean, that’s a patchwork at any point in time, and one that hasn’t changed in a single direction over time.