It's not quite the same as a 'black hole'.
In the worldview of many low-level civilizations, a white hole is a 'hypothetical celestial body', meaning it theoretically exists, but whether it truly exists—it's unclear, and whether it can be created—is also unattainable.
If there's a black hole in your star system, you can easily observe it.
Wow, so large, so black, so much fuzz (gravity hair).
Of course, it might also be hairless (no-hair theorem of black holes).
This depends on the height of your unlocked technology tree.
But 'white holes' are far rarer than black holes.
Even a Level 3 Civilization might not capture the white hole phenomenon in the cosmos.
Because it is mobile, and it often involves 'cosmic creation'.
It is one of the few 'cosmic-level material sources'.
In other words, it is one of the few 'creation methods' post-Big Bang.
For example, an advanced civilization like the 'Ancient Mechanical Civilization' wants to create a cross-galactic giant structure.
