Where have you been fishing? I've found that most valyrian swords line up with the history in the books. All excepts maybe Vigilance depening on how you look at it.

i was just fishing outside of white harbour i will try fish near where the sword is found in the history if i can work out where that is but so far all i can find on it in lore is it was lost in kings landing.

Are you talking about actual fishing or more like attacking all lords around white harbour? Try to attack the current lord of house Royce, if that doesn't work try either other houses in the Vale or something connected to Kings Landing

I found the sword Vigilance from the current lord Hightower, even though I believe it was lost in battle for example

The page i found with the unique weapons says lamentation is gotten from actual fishing. well was i don't know when this page was updated last.

Here is the page: https://aworldoficeandfire.co.uk/wiki/index.php/Unique_Weapons#From_The_War_for_Dawn_Quest

also i just checked some files of the mod and just noticed Brightroar is a thing but i haver never seen it before does anyone here happen to know if that was ever added into the game or is just a dev thingy?