The word Universe is not a scientific word. There are no smaller universal units that in combination make one large Universe.

In reality, the universe contains one and the same ingredient, but in different formats: Energy.

The universe also contains something else: Space.

As such, the Universe is an overall setting containing a functioning that is akin to the binary system: lots of 1s and 0s.

Let's stay at the overall level:

There is no single one of all these 1s that is thé 1. There are only smaller 1s, and collectively they do not form a larger 1. The abundance of all the 0s does not only show how the Universe cannot be based on just 1s of some kind, but it also shows that there is a fundamental breakage among all these 1s. The 1s are to some extent always individualized.

Einstein's best buddy already proved this about 100 years ago with his Incompleteness Theorems.

On Einstein's 70th birthday, Gödel also presented Einstein his Gödel Metric that explained every anomaly seen among the behavior of matter moving through space, just like Einstein's Spacetime did.

Einstein was flabbergasted because he knew that Gödel was (also) correct but in a different manner. So, both were right, which means that both were not yet at the final correct answer.

'Einstein, Gödel, and Me'

https://medium.com/@fred-rick/einstein-g%C3%B6del-and-me-5bee14dd0edd