This question already has an answer here:
I have read this question:
But it does not have a satisfying answer.
And this one:
This one says that we are not inside a black hole, because:
The large scale geometry of the universe is described by the Friedmann-Lemaitre-Robertson-Walker metric.
The geometry of the spacetime of a black hole (in its simplest form) is described by the Schwarzschild metric.
Safesphere's comment says that our universe is inside a white hole.
- Which one is it, is our universe inside a black hole or a white hole or none?