There should be a screenshot utility installed by default.
A quick search in Google points to https://help.gnome.org/users/gnome-help/stable/screen-shot-record.html.en, the same content that appears in GNOME Help that points to a screenshot utility that isn't installed.
gnome-screenshot is part of the gnome-desktop comps group, which is included in Workstation. Are you really certain it's not there? Did you use the normal live installer?
It's installed on a system that I installed Workstation on just last week.
It sorts under the Utilities folder.
It's not in utilities and rpm -qa doesn't show it. I'm using Silverblue.
rpm -qa
Then the bug should be reported in https://github.com/fedora-silverblue/issue-tracker/issues and not here. Also in Silverblue it's being shipped as Flatpak, what's the output of flatpak info org.gnome.Screenshot. It should be preinstalled starting with Fedora Silverblue 32, but only if you've done a clean installation.
flatpak info org.gnome.Screenshot
I'm going to close this since it turned out to be a Silverblue issue, but feel free to report against the Silverblue issue tracker.
Metadata Update from @catanzaro: - Issue close_status updated to: Can't fix - Issue status updated to: Closed (was: Open)
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