It is probably a good idea to mention what Redshift actually is, since it’s far from the top result in a search, and a lot of people associate that word with an AWS product by the same name. Wikipedia describes the Redshift you presumably mean as:
an application that adjusts the computer display’s color temperature based upon the time of day.
It also mentions that gammastep is a more recent fork, but it has not had any commit activity for 2.5 years, so gammastep might be abandoned as well.
Using RPMs through a frontend like Discover or Gnome Software can sometimes have unintended side effects that are much more easily anticipated when using dnf.
Just the other day, I uninstalled something through Gnome Software that was an RPM, and it also removed fuse-fs packages, breaking all of my appimage stuff until I manually installed fuse again.
This doesn’t ever happen with Flatpak in my experience, though I could just be lucky. It makes some sense to limit the destruction potential for less technical frontend installers like Gnome Software and leave the RPMs to something else like dnf. Though, I do really enjoy being able to open a manually downloaded RPM in a nice GUI to install it.