Some people fret over the 400 year gap between the Old and the New Testament. Why so long they ask. Why wasn't God speaking or active during those years? This is a question only God can answer. Could it be that time had to elapse so that Christ could be born at the right time? For some reason known only to God, it was important for Christ to die exactly when He did.
My question to add to this mystery is, why has God not said anything since the first century CE? The writings of the apostle John are the last words written that are in the Bible. First, second, third John and the Revelation are the last times written words were incorporated into the cannon of scripture. We spend most of our time taking ancient texts and working to make them understandable to a modern audience.
I have said this before, but we get more instruction on how to organize and run a local church from modern church history than we get from the Bible.
I guess that God had said all that He had to say by the end of the first century CE. The Bible, which tells God's story going all the way back to the creation story, has zero to say about AI or high tech or even the printing press.
One thing that this tells me is that people do not change over the centuries. There is no evolution causing people to adapt to our surroundings. But, cultural practices are vastly different today from what they were in ancient times. Abraham may have had the same hopes and fears as us, but his morals were quite different.
So do not lose sleep over the missing 400 years. We have had 2000 plus years of silence to date.