Song isn't in any particular order.

Timestamps:
Part 1: 00:00
Part 2: 01:53
Part 3: 04:11

All base (purchasable) boards:    • Legends of Runeterra - All Boards Sou...  

Playlist:    • Legends of Runeterra - Ionia Extended...  

All extra wallpapers from Wallpaper Engine:
"star guardian スターガーディアン" - maclay.
"League of Legends Jinx Star Guardian" - Bafelmauk