Xenoblade Chronicles 3 site has three more music tracks. No xpacket data though.

https://www.nintendo.co.jp/switch/az3ha/index.html

Chain Attack
https://www.nintendo.co.jp/switch/az3ha/assets/audio/bgm06.mp3

A Step Away
https://www.nintendo.co.jp/switch/az3ha/assets/audio/bgm07.mp3

A Formidable Enemy
https://www.nintendo.co.jp/switch/az3ha/assets/audio/bgm08.mp3