Music of Xenoblade Chronicles 3

The music of Xenoblade Chronicles 3 consists of an unknown number of tracks, several of which have been officially released as of June 2022. Yasunori Mitsuda, ACE, Manami Kiyota, Kenji Hiramatsu, and Mariam Abounnasr all contributed to composing for the game.

Significance in-universe
Music is relevant to the game's story and lore. The main characters Noah and Mio are off-seers, people who mourn those who died in battle, and both play a flute-like instrument (presumably) as a part of this practise. According to Mitsuda, the flute motif is meaningful to the music as a whole, and the instrument features prominently in the music of the reveal trailer.

Website BGM
The official Japanese website for Xenoblade 3 features a button labelled 'BGM' (an acronym commonly used in Japanese to signify 'background music') which, when pressed, plays A Life Sent On.

Xenoblade Note vol. 5
Xenoblade Note vol. 5, a blog post on Nintendo's Japanese website, included links to several unlisted YouTube videos of the game's music: A Life Sent On, The Weight of Life, and Keves Battle. These tracks were also posted by the XenobladeJP twitter account, as well as the accounts of various regional Nintendo departments, around this time.