They discussed it, but no one has taken it on yet. I think Wojtek Mach(the desktop initial author) is a mac user, and they actively wanted to provide a way for windows users to easily try it.
We don't plan to add Linux support ourselves at the moment but we'd love if someone contributed that. As was mentioned elsewhere it might be challenging to provide a bundle that works across different distributions so investigating the possible options would be an important first step.
An AppImage or Flatpak package would make a great starting point that works across distributions. Making Livebook more accessible to Linux developers would improve its adoption, as well as the adoption of Elixir, Phoenix, and Fly.io.