If our universe was inside a "black hole" seen from the outside, how would we ever know? For al we know the percieved timescale of the big bang and the time si

If our universe was inside a "black hole" seen from the outside, how would we ever know? For al we know the percieved timescale of the big bang and the time since it is just timedialation, and that black hole might even exists in more than 3D.