ribugent [1] filed a deletion request for joplin-desktop-bin [2]:

This is a duplicate of https://aur.archlinux.org/packages/joplin- appimage

I'm not sure at 100% which of both have the right name, but both uses the appimage release.

[1] https://aur.archlinux.org/account/ribugent/ [2] https://aur.archlinux.org/pkgbase/joplin-desktop-bin/