Follow these simple steps to start using Flatpak
A flatpak package is available in Raspberry Pi OS (previously called Raspbian) Stretch and newer. To install it, run the following as root:
Flathub is the best place to get Flatpak apps. To enable it, run:
Important note: It is recommended to use Raspberry Pi OS 64-bit as newer applications are more likely to be available for that platform only.
To complete setup, restart your system. Now all you have to do is install apps!
Note: graphical installation of Flatpak apps may not be possible with Raspberry Pi OS.