Hmm I'm not sure. I'm not from US, and while I am very familiar with Edward Snowden, I have never heard of Chelsea Manning, I had to do a wiki search to read a bit about her. I guess the international coverage just wasn't the same in her case.
Unfortunately you are pointing directly at a major reason why the world forgot about Bradley Manning the war crimes exposer: she changed her name to Chelsea Manning and the media story changed to transgenderism / trans rights.
So, basically the media story and the name changed / got more complex, and a lot of people got left behind / quit caring.
Also, it's harder to make the case that Manning was a whistleblower. Manning just dumped as much classified intel info wikileaks as she could. More of a disgruntled employee than freedom crusader IMO.
Thank you, that might explain it somewhat. Although you are still blessed with a free press — and your major newspapers do appear to have reported on this issue up to 2014 — mainstream media now seems dominated by other interests. The way PiS is trying to control the public discourse is worrying; at least from an outside perspective.
