One consolation is that they measure in light years
which means that a whole lot can happen in 5 to 10 billion years.
Because that void is 5 to 10 billion light years away, it takes that long for any light from there to reach us.
So that means that the hole that they are looking at now is based on what it looked like billions of years ago when the light (or lack thereof) left it and finally reached our eyes.
The stars in the sky are so far away from us that by the time the light from them reaches us so we can see them, many of them have already burned up and are no longer there, but we continue to see their light as stars because of the vast distance.
Astonomy is so facinating!