I have CorelDraw 2019 and I can not Find the Nudge Space Setting?
In the default workspace, the control for nudge distance is present on the Property bar that is displayed when nothing is selected:
...or double click a ruler to bring up Options > Document > Rulers dialog.
One of the first things i do, if not importing my own custom workspace, is dragging that icon to the main toolbar so it's available all the time even when something is selected. I use the nudge for many functions to include macros.