Correct, the screenshot utility is different, as is now integrated into the gnome shell whereas previously it was a standalone utility. Luckily, you can install that and replace the keyboard shortcut that triggers it.
It also had a bug when saving screen recordings, but I haven't followed up on that in quite a while; it may have been fixed already.
You can install it with sudo apt install gnome-screenshot and then follow these steps to update the keyboard shortcut.