You are using Fedora 44 with the GNOME desktop environment, but there are other desktop environments with different screenshot tools. For example, KDE Plasma uses Spectacle:
Since there are several desktop environments and multiple screenshot tools, keyboard shortcuts between them may not be universal.
Flameshot or Shutter:
Yes, in GNOME Console, type this command:
gnome-screenshot -d -5
That gives you a five second timer.