I think there is really just too much that we don't know. We don't know how much of a gap there is in the genealogies and we don't know what sort of later editing was done to align city names with later names and we don't know if the names in the list of nations is people or nations and we don't know if earlier towns existed under places where later and larger ones were built and we don't know where the chaldeans came from and if they were in UR at the time of Abraham and etc. We don't even know whether it was Nimrod who established multiple cities or if it was his descendants.
There are many things in the Bible like this and later findings have verified what the Bible says. That is the view of faith anyway. We cannot say for sure that the Bible is not right in what it says of the period between the flood and the Patriarchs.
You are just speculating and making excuses.
There are no biblical writings in the Bronze Age, neither in the 3rd millennium BCE (nothing from Enoch and Noah), nor in the 2nd millennium BCE (nothing recorded from Abraham to Joshua and the Judges).
Even in the early Iron Age, there are no one writing books of Samuel, Kings, Psalms, Proverbs, from Saul to Solomon.
None of these books from Genesis to Kings existed until either the late 7th century BCE (eg reign of Josiah) or more likely the 6th century BCE (eg Babylonian Exile and the so-called Second Temple period).
There are some real historicity to be found in the books of Kings, but only when there were already two kingdoms, Israel and Judah, where we can actually timeline of kings to independent sources, like from Assyrian royal archives and annals that recorded some kings’ names being contemporaries with Assyrians. The Assyrians recorded no David, nor Solomon, and neither did the contemporary Egyptians.
So Genesis didn’t exist until the the 6th century BCE, so Genesis and Exodus were never written by Moses, which make Moses being a mythological character too. Genesis to Deuteronomy May have been attributed to Moses, according to Jewish and Christian traditions, but there are no Late Bronze Age Torah or Pentateuch in existence.
So about Genesis 10 writing about Egypt, and Nimrod building cities in Babylonia (Shinar) and Assyria, were just myths, writing after the facts' but with 6th century BCE, having no real histories of what happened to the Hebrew people prior to the existence of Israel and Judah kingdoms.
Genesis 11 about Chaldeans in Ur, wrong; Genesis 11 establishing ties between Chaldeans and Ur, are anachronistic. The only people that established themselves and spread through Babylonia, were the Amorites, who established Babylon as their capital and the 1st dynasty of Babylon were actually Amorites, not Chaldeans.
There are no records of Chaldeans living in 2nd millennium BCE Old and Middle Babylonian periods, which coincided with Middle Bronze Age and Late Bronze Age, The Chaldeans didn’t exist in this region, not until the 10th century BCE, in Assyrian annals, when they migrated into the region between Ur and marshy region to the shoreline of Persian Gulf.
And I have written previously, Egyptian culture predated the 1st dynasty, as did the pre-Sumerian Uruk (Erech) and Ur, both of them thriving cities, since the beginning of the 4th millennium BCE. Archaeologists even named MOST of the 4th millennium BCE, as the Uruk period (c 3800 - c 3100 BCE).
The Sumerian proper began with the Jemdet Nasr period (c 3100 - 2900 BCE).
But Uruk predated the Uruk period. The oldest settlement of Uruk was founded around 5000 BCE. Nineveh is even older, at around 6000 BCE. Both Nineveh and Uruk formed in the Ubaid period (6500 - 3800 BCE).
Ubaid, Uruk and Jemdet Nasr periods are all named after the distinctive types and styles of pottery being used at these periods, and developed in each of these towns (Tell al-Ùbaid, Uruk (Unug) and Tell Jemdet Nasr).
Genesis 10 (about Egypt, Nimrod with Babylonia & Assyria) & 11:28 (about Ur and the Chaldeans) don't verify anything. All it shown that there are not much historicity in Genesis.
There are also not much historicity about what Exodus say about Rameses (Egyptian Pi-Ramesses) and Joshua about Jericho and Megiddo.
The actual city of Pi-Ramesses wasn’t constructed until the 19th dynasty, where Seti named the city after his father Ramesses I, but it was completed until by Seti’s son, Ramesses II. And Pi-Ramesses was a city with summer palace, not a supply town, as Exodus 1 stated.
The construction of Pi-Ramesses (13th century BCE), post-dated Jericho abandonment around 1570 BCE. Another thing Bible got wrong.
Clearly Genesis, Exodus and Joshua are completely unreliable sources. It only have invented myths about the regions and cities these books mentioned.
