It’s a long process to get into Fedora, but we’re gonna give it a shot for sure.

Since it's written in Go, you might want to reach out to the Fedora Go SIG and see if they can help you. :)

It is, but you can start with a COPR repo instead.

what about flatpak?

I've been using Arch Linux and macOS for the longest time, so I never saw the appeal with flatpak. It could be a good option until Rune is popular enough. fwiw I'm also working on a cask for homebrew.