The Legend of Zelda: Tears of the Kingdom is the biggest boxed video game launch of the year in the UK.
Its opening week sales eclipse the boxed sales of Hogwarts Legacy by more than 50%. This is just boxed sales, and Hogwarts, which was released on PC, PS5 and Xbox Series S and X in February, did have a very strong digital launch. Switch digital sales are typically much lower than the other platforms, so it's unknown if the game outsold Hogwarts overall (Nintendo doesn't share digital data with the charts companies).
It is easily the biggest Zelda launch in history, selling more than 2.7 times the opening week sales of Breath of the Wild from 2017.
source https://www.gamesindustry.biz/the-legend-of-zelda-tears-of-the-kingdom-shatters-sales-records-in-the-uk-uk-boxed-charts