For those who'd like to see similar techniques in action, a popular Youtuber recently made an iron arrowhead using iron age(?) metallurgical techniques [0].

He gathers water containing iron-oxidizing bacteria, he extracts the ore using a sieve, he then smelts the ore with a handmade blast furnace and charcoal he made himself. He then separates prills from the slag and forges them into a knife with a clay mold and said blast furnace. After all that, he has the worlds worst and knife.

[0] https://www.youtube.com/watch?v=dhW4XFGQB4o

Curious as to how much meteroic iron could be salvaged and then worked by these pre modern societies. I think the Egyptians had a few iron artifacts that were conclusively from meteorite iron.

King Tut had a dagger made from a meteorite. I think it was pretty rare.

The Greenland Inuit used iron from the Cape York meteorite to make spear heads.

Some believe that the chunk of iron that Achilles offered as a prize in the Iliad was of meteoric origin.

While not Fennoscandia, there is the 3000 year old Kaali crater in Estonia, ie during the stone age, a thousand of year earlier than what this article is about. There would have been iron available from it, and there were settlements afterwards around the crater.