I linked to it, here it is again: https://universal-blue.discourse.group/docs?topic=41#features-9

And the previous link was directly to the source code of the image.

Of course you can install gparted, you can run just about anything that you want, it's still Linux.

Someone just merged some shortcuts to let you turn them on and off easier: https://github.com/ublue-os/config/commit/0823567237f8d83a50a75e9a7cd15c7c9d758d22