Therein lies the paradox of the Big Bang Theory, the BBT. According to the BBT, the universe is some 13.7 billion years old, give or take a couple of tenths of a billion years. So then, how did the light from GNz7q, travelling at one light-year per year get to us from 25 billion light years away in 13.7 years?
Well, according to the BBT, very early on, the universe simply "expanded", at well beyond the speed of light, to the size at which it is now. Huh? The scientists are saying that it simply violated the laws of science. You must have faith!
Not a problem.
The light you see NOW is where it was THEN, 13.7 billion years ago.
We cannot see it it where it is NOW, which is about 25 Billion light years away............