Arch Linux
An Arch Linux package is available here. To install it, use an AUR wrapper such as yay: yay -S joplin. Both the CLI tool (type joplin) and desktop app (type joplin-desktop) are packaged. You can also install a compiled version with the chaotic-aur repository. For support, please go to the GitHub repo.
https://aur.archlinux.org/packages/joplin/