The Void is not a level. It is what is between the backrooms levels. There is absolutely no escape from here. There is nothing here, just a dark, empty, void.
It has no escape, no entities, no sound, no furnishings, no lights, no food no nothing. You're just trapped, falling forever until you die from starvation, with nowhere to go. This is arguably the most dangerous place in The Backrooms.
Entrances & Exits
Entrances
You have a .000005% chance of accidentally entering the void anytime you no-clip through the backrooms. As it is what is between the levels.
There is a .0000075% chance you end up here when first no-clipping into The Backrooms.
There are many ways of getting to this place located throughout the levels.
Exits
As said earlier, there is no escape. There is nothing.