GNU/Linux Installing Flatpak Guide
You are Welcome! The Tutorial Shows You Step-by-Step How to Install Flatpak in GNU/Linux Desktops.
And Flatpak for Linux is a technology for Building, Distributing, Installing and Running Linux Apps.
Furthermore, the Flatpak App is Build into a Container like Docker and can be Installed on All Linux Distros disposing of Flatpak.
Finally, Flatpak is primarily targeted at the Linux Desktop, although it can also be used as the basis for application distribution in other contexts, such as embedded systems.
Suggestion: in case to Find it Easily Search with Cmd/Win+f or Ctrl+f and your Distro Name!