Nobody is saying these galaxies are trillion of light years away. The claim is that they are at high redshifts like 14-17 which puts them roughly 250 million years after the Big Bang. It should be kept in mind the redshifts claimed are from ascertaining the overall color of the galaxies and not from spectroscopic redshifts. When we have those it can be established if these galaxies are really at those high redshifts.
They estimate the observable universe is 94 billion light years across but we can only visibly observe about 13.4 billion light years.
By my estimation the Universe is 13 trillion light years wide. We of course can't see that far but take my word for it, it is.