We cannot see other material universes outside our own individual universe, EVERYTHING we see is within this one universe.

We cannot see other material universes outside our own individual universe, everything we see is within this one universe.

In Srimad Bhagavatam Canto 5 Chapter 21 Text 11 Purport  -

Srila Prabhupada - "Each universe is covered by various layers of material elements (the surrounding Brahmanda our universe is deep within), and therefore we cannot see from one universe to another"

The Painting below shows unlimited Brahmanda's each with their own universe deep within each Brahmanda.

Srila Prabhupada  - "In other words, whatever we see is within this one universe. In each universe there is one Lord Brahmā, and there are other demigods on other planets, and there is only one sun"