How did black holes got so early "at one side" of the universe? due to the Big Bang Black Hole Dark Matter String nucleus explosion of the former Big Crunch.

  Only 6 of them we are still able to see at only one side of our observable bubble (below yellow sphere) Why? because all the other early black holes are further away from us and  out of sight.

So, We live inside an exploded Dark Matter Black Hole with the earliest black holes at the outside of the pear shaped balloon as one universe inside the mirror symmetric Raspberry multiverse. (below)

The 6x earliest Black Hole Galaxies.(Q-FFF Model)

The first Black Holes are called Tadpole BHs propelled by its self created and repelled  plasma tail ll seem to have a lefthand spiral in our material lefthand vacuum space frame system. Self creation and repelling of plasma is originated by the Penrose "trapped space" horizon of each black hole.