Risi Welcome Screen / Script

Im trying to use the script / screen for fedora to configure it for my personal needs. Would also like it to use it as an example for the Gnome Workbench, to get into it.

Which repositories do I have to install and what exactly is the package/dependencies I need? (I guess it is available in Flatpak, right?)

Is it possible to use it, without have to adapt do much In Fedora?

Thanks in advance for the Information.