Of course the existence of Sodom and Gomorrah is indeed confirmed by these tablets.
The fact that they are set in an earlier time cannot be at all relevant logically to the later time of Abraham as they cannot possibly speak of an event which had not yet occurred when they were written viz. the destruction of these cities which is also confirmed by other data.
Nor can any logical deduction be made nor any need be to 'shift' Abraham to an earlier time since the tablets make no reference to Abraham but only to the existence of Sodom and Gomorrah at the time when they were written.
Uh,....Sodom and Gomorrah were cities in the Bible, not books. Not sure what the question is?
Jewish tradition states that Sodom and Gomorrah were destroyed in April.
It is possible that there were homosexuals before the time of Sodom and Gomorrah. But it had increased to much higher level at Sodom and Gomorrah times.
Some biblical scholars believe that Sodom and Gomorrah were destroyed around 1892 B.C.
Sodom and Gomorrah is the first mention of homosexuality in the Bible, but it is likely that it existed before then.
The two cities that God burned because of their sinfulness are Sodom and Gomorrah, as described in the Bible in the book of Genesis. God destroyed these cities with fire and brimstone due to their great wickedness and immoral behavior.
The story of the destruction of Sodom and Gomorrah is in Genesis Chapter 19.
Sodom and Gomorrah Genesis 19:24 Then the LORD rained brimstone and fire on Sodom and Gomorrah, from the LORD out of the heavens.
Abraham
Yes, of course he does.
An angel
Lot's wife was told not to look back at Sodom and Gomorrah. When she did, she turned to a pillar of salt. Genesis 19:26