Nope. He did not build a dam. And you can Google that. He built a causeway. A causeway is not a dam.
There was also a mainland where people of Tyre apparently lived. King David at one time lived in a castle in raised mountain area... but the people lived in lower areas. The King of Tyre was on the raised rock.
No, the land areas were under Tyre's domain, but were not Tyre. Even the Bible verse notes that. Why didn't you read the Bible verse itself? Or didn't you understand it?
Some are still in Tyre. Some have moved on. People move. And remember the prophecy only applied to Nebuchadnezzar.
OK... he said this
So? If the Tyre people's population spread to the mainland and settled there, it would still be called the land of Tyres. Just look at the thirteen American colonies and America today. Are the eastern starboard states called the colonies, and the rest America? Same principle applied.
Where are the Tyre people today? Just because someone lives in what was once Tyre, does not make them the original Tyre people. Just like the Arabs who claim to be Palestinians are not Philistines .. Palestine means the land of the Philistines.