3. Installing Flatpak
Finally, to Install Flatpak for Ubuntu Focal
sudo apt install flatpak
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
Again for the Desktop integration run:
sudo apt install gnome-software-plugin-flatpak
And with this latest setup on GNOME based you’ll be able to Install Flatpak Apps just Double-clicking on the downloaded flatpakref File.
4. Flatpak Getting-Started
How to Getting-Started Searching & Installing Flatpak AppsFlatpak Apps Installation Quick Start Guide