Actually, the phrase "outside of time" is the problem. Recent articles have suggested that time isn't uniform, either. Thus to say something is outside of time has a prior question to answer... what IS time? You can't say something is outside of something that you can't define.
Einstein's viewpoint implicitly required a uniform flow of time because of the concept of simultaneity. JWST and its observations are blurring some of those lines, and the work done with quantum computing is also making that discussion quite bumpy.
The strict definition of eternity in the NON-religious sense simply says that this question makes sense: "What happened before the Big Bang?" If you took the initial view of the BB, time started when the BB occurred, which implies that there WAS no "before the BB." I have never been a proponent of that view because the occurrence of the BB depends on probabilities of something happening, but if time doesn't exist, what COULD have happened before there WAS a "before"? Let's just say that all such questions are currently in flux.
My comment about JWST includes findings of fully formed galaxies being viewed from an apparent time (estimated via red-shift) older than the BB. Things seen in the distance are developed enough that they didn't have time for the "normal" events related to galaxy formation. Which has led some astronomers to suggest that the BB might have occurred - but that it was one of potentially MANY such events, and therefore was merely a regional event rather than a singular event.