I have sincerely not idea. I skipped over any https talks because it was not fun to look at and assumed folks would have a dependency. There is a list of client/server in a bunch of mainstream languages, did those people had to implement TLS? That sounds like work.
The distinction between devs and users is less sharp when everything is as simple as the Gemini ecosystem. And that is precisely what they want: technology that is resilient and does not (and will never) depend on a caste of specialists and large corporations such as Google, like the web does.