YouTube Music (streaming for free)
SoundCloud track previews, full tracks with subscription clintonshorterofficial:
Subscripton or purchase-to-download:
https://play.google.com/store/music/album/Clinton_Shorter_The_Expanse_Season_3_Original_Tele?id=B2qwibo2dv3dbti3nm452mcclea
Apple Music https://music.apple.com/us/album/the-expanse-season-3-original-television-soundtrack/1472277708