The part about Alexander the Great? It describes weaponry that did not exist in Ezekiel's day. It was prophesy. Prophesy often times foresaw what was not known in the day it was given. For example, Psalm 22 describes crucifixion. When the prophesy was given it was not a method yet used for execution.
Nebuchadnezzar was a contemporary of Ezekiel, not Alexander the Great who appeared later on. The weaponry of Alexander the Great took Tyre by surprise. Until then Tyre was unbeatable. That is why Nebuchadnezzar could not fully take over Tyre in his day.
Siege of Tyre - Alexander the Great Siege of Tyre
Ezekiel 26:9
"And he shall set engines of war against your walls and with his axes he shall break down your towers."
That was not the way it happened with Nebuchadnezzar!
Alexander invented catapults that could throw a 200 lb rock a half mile at and over the walls. Up till then, the Rock of Tyre had been impenetrable. Ezekiel 26:9 could be used to mean battering rams,
mehhi qaballo, "a striking of that which is in front," could mean battering ram, or balista, or catapult;
"he shall set an apparatus for striking against thy walls"
There was no way any battering rams could have been used against the walls of Tyre. For it was surrounded by very deep waters. Alexander had invented powerful catapults ... which was what was used in his siege of Tyre. Neb had no such weaponry.