Due to the finite speed of light and the expansion of the universe - with changing expansion rate - describing large scale distances in the universe is somewhat tricky. There are several different distances measures like proper distance and comoving distance. [1] I am totally not an expert on this but it is not necessarily contradictory that the observable universe is 93 billion light years across and that a star 9 billion light years away is halfway across the universe, those two statements may just use different ways of attaching a number to cosmological distances. The universe is only 13.8 billion years old and therefore no light could have reached us from more than 13.8 billion light-years away if the universe were not expanding.

[1] https://en.wikipedia.org/wiki/Distance_measures_(cosmology)