sudo apt install flatpak sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo sudo apt install gnome-software-plugin-flatpak gnome-software
Source: How to Install Flatpak on Ubuntu
#ubuntu
sudo apt install flatpak sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo sudo apt install gnome-software-plugin-flatpak gnome-software
Source: How to Install Flatpak on Ubuntu
#ubuntu