

If you assume that space is expanding, then time is also expanding.
The expansion of the universe cannot be observed locally, you have to look at something very far away to see the redshift of some distant star or galaxy. By doing so you are looking back through time. The farther away you look, the farther back in time you are seeing. But the rate at which the distant objects are accelerating away from you is not static, it is increasing as the distance increases.
So the time it takes for the light to get to you is increasing. Time is expanding relative to you. Time and space are not separate, they are linked. If something gets far enough away, then the time it takes for it’s light to reach you becomes infinite, essentially removing it from your existence entirely.











Maybe? The truth of the matter is that we don’t really know very much about reality. Dark matter and dark energy are placeholders for something in reality that we have no explanation for, like the nested heavenly spheres of the earth-centric astrophysical model that describe the retrograde motion of the planets.
https://en.wikipedia.org/wiki/Celestial_spheres
The expansion of the universe is also likely to be a misinterpretation of reality as it really is. Especially with findings of the james web telescope, we are constantly finding phenomena that show us just how little we understand.
And if you learn about evolution and perception, you start why we can get things so wrong.
https://youtu.be/oYp5XuGYqqY