The cosmological multiverse does what you ask. There are several kinds of cosmological multiverse, the most common being eternal inflation, but first we do not think our universe will end in a Big Crunch:
If the cosmological constant were actually zero, the critical density
would also mark the dividing line between eventual recollapse of the
universe to a Big Crunch, or unlimited expansion. For the Lambda-CDM
model with a positive cosmological constant (as observed), the
universe is predicted to expand forever regardless of whether the
total density is slightly above or below the critical density; though
other outcomes are possible in extended models where the dark energy
is not constant but actually time-dependent.
But that doesn't mean other pocket/bubble universes (n.b. parallel is usually restricted to talking about the Many Worlds interpretation of QM, not for cosmological universes) within the multiverse can't have a Big Crunch, among many other possibilities. Whether or not there is a multiverse is of course unknown, and there are many types of multiverses and how they are formed. There are many reasons to ponder their existence.  Apparent "fine tuning" of many physical constants  No way to calculate many of them except empirically (no underlying theory to predict them).
Lambda (Λ), commonly known as the cosmological constant, describes the
ratio of the density of dark energy to the critical energy density of
the universe...If the cosmological constant were not extremely small,
stars and other astronomical structures would not be able to form.
N and ε govern the fundamental interactions of physics. The other
constants (D excepted) govern the size, age, and expansion of the
universe. These five constants must be estimated empirically.
So without any deeper mechanism behind these constants being what they are (and suitable for life), we either got lucky, or some aspect of the anthropic principle had an effect and we are just one of many (bubble) universes with varying fundamental constants. The most common type of multiverse is the inflationary multiverse. Some patches of this spacetime have negative cosmological constants and thus "Big Crunches", some rip apart before any structure can form, and some are like ours where there is balance between gravity and dark energy/CC allowing structure to form.