There are big wishes for Signal to adopt the perfectly working Flatpak.
This will make Signal show up in the verified subsection of Flathub, it will improve trust, allow a central place for bug reports and support and ease maintenance.
Flatpak works on pretty much all Distros, including the ones covered by their current “Linux = Ubuntu” .deb repo.
To make a good decision, we need to have some statistics about who uses which package.
It could be both. A highly private app that nobody uses provides less privacy than an app that’s only somewhat less private (i.e. has to be downloaded via Google Play or via a self-updating APK from their website instead of F-Droid) that millions of people use.