Those aren't proofs of the existence of God or of the sliritual rightness of Islam. They're historical accountings, though not entirely correct, of ancient Egypt.

Ancient Egyptians first found iron in meteorites and began working it. The core of Earth also has a lot of iron in it. Turns out iron is very common in the universe.

It's more accurate to say that Ancient Egyptians found and worked iron that was not natve to Earth than to say iron is not native.

Also, while.its true most iron found on Earth's surface came from nickel-iron meteorites, there is some native iron also on Earth's surface. This fact also makes the Quran false. It's got the same problems the Bible does.

It's a Bronze age text. It might hold some historical and archthropological interest and it might hold some universal wisdom but is not, never has been, and cannot be "THE truth". Your choice to believe it is just that, a choice based on faith, not rational or objective thinking.