Are galaxies and other formations more prevalent at the center of the universe or are they found evenly distributed throughout?
The universe almost certainly has no center.
When we think of the Big Bang, we naively think of matter exploding out from a central point in 3 dimensional space, which would naturally be the "center of the universe".
That is not what is described by the "Big Bang" theory.
It may help to think about the surface of a spherical balloon. As the balloon is inflated, the surface grows larger in every direction, but there is no center to the surface on the surface. Of course the universe is (roughly speaking) three dimensional rather than a two dimensional surface, but the analogy may be helpful.
As to whether galaxies and other formations are evenly distributed, it depends what you mean. As we see further, we find ever larger structures of clusters of superclusters, but there seems to be no universal preferred directions. If we point a telescope at what seems the emptiest patch of sky and look hard enough, we see myriads of galaxies.