I live in an area where it's really common, mostly transitioning in the last 18 months. This includes 3 kids at my kids' primary school, more at the high school, one member of staff there, a neighbour and a friend - this doesn't even touch on friends of friends. All name changed, announced the change, pronouns etc. I also have a lot of students who registered as non binary and wear pronoun badges (so I can tell/ know for sure). I'm really uncomfortable with the children under 10, but the rest no longer stand out as anything that interesting.
The students just seem the new emo, goth, punk etc. It must be hard to shock the generation above, I don't see many of them bothering long term. I don't mean that in a dismissive way, but it's reassuring that this might not be a crisis and surge in dysphoria that it sounds like on paper.
I don't know many "activist," types though, except the parents of one of the children. At a wedding, the older trans woman waited until the ladies toilet was empty before going in, trying not to make a fuss. Most are just bobbing along, going to work etc. However, even if I didn't know for sure, I'd be able to tell for all the adults what sex they were born.