Also, instead of two pieces, Narsil is broken by Sauron himself when he kills Elendil, shattering into multiple shards that, in the following millennia, are exhibited in Rivendell.

Narsil and its Lord of the Rings history, explained – Why Elendil's new sword in The Rings of Power season 2 is more important than you may realize News By Bradley Russell published October 3, 2024 ...

Narsil, whose very name represents the Sun and Moon, will break in two during that fight. (Peter Jackson showed it breaking into many shards).

Eventually, something we won’t see on The Rings of Power proper, since it takes place in the Third Age, Elrond will give the shards of Narsil to a young Aragorn, who will carry them with him ...