Galaxies are the same everywhere. Those galaxies we just found from jwst are surprisingly well formed for that early tho. Which means we are missing something or over/under estimated are models of expansion. But these images are far more precise than before with near infra-red observations. So where before we were just drawing the outline of our portrait, now we are starting to fill in the details. It's more precise, and more likely to miss perfection. That's never bad though, the best parts of science are the anomalies.

And the universe isn't very different actually. It's surprising uniform in temperature. And when modelled with respect to the cosmic microwave background radiation, our universal distribution of galaxies looks like what would result from those very tiny temperature fluctuations early on.

The physics didn't change, the temperature did... allowing for more advanced elements to be created. The temperature changed because of inflation and the dissipation of energy resulting from that expansion. Heat is basically just the friction of things bouncing into each other. So the more room you have, the less things will hit each other, and as a result, decrease temperature. The universe atm is 2.7 Kelvin and its only getting colder... very, very slowly. Weird thing is, the universe is still inflating, and even wilder, that inflation is accelerating.

My favorite quote on fiction... make believe has to be believable, reality rarely is.

This is a more common concept in the multi-verse model, comparing between universes, not within a single universe.