Follow these simple steps to start using Flatpak
Flatpak is installed by default on Rocky Linux 8 and newer, when installed with a software selection that includes GNOME (Server with GUI, Workstation). If you are using such a system, you may skip this step. To install Flatpak on Rocky Linux, run the following in a terminal:
$ sudo dnf install flatpak
Download and install the Ramatak repository file, or run the following in a terminal:
$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
$ flatpak remote-add --if-not-exists ramatak https://download.ramatak.com/ramatak.flatpakrepo
To complete setup, return to the download page, and follow the instructions.!