Russia, North Korea, Iran have no reason to launch cyberattacks on China. Neither does Israel, really (their capability is far more oriented towards, y’know, their immediate vicinity). We’re left with the US and UK, but as we all know, the UK doesn’t really have international power anymore and as a result has little reason to provoke China.
This article starts with talking about the spy balloon that wasn’t a spy balloon: https://www.cbsnews.com/news/the-bizarre-secret-behind-chinas-spy-balloon/
So… The only reason people even consider this a spy balloon is because some guy in China launched it? Wonderful.