Just wanted to share the Amazon link: https://www.amazon.com/dp/B07VZX2QGQ/ref=dm_ty_trk
The original preview announcement mentioned an Amazon listing, but the release day announcement only links to the DRM iTunes link (which is also more expensive). And iTunes locks the Rhapsodies ending theme to the full OST purchase (can't buy it solo).
Whereas, Amazon also offers the theme by itself for $0.99: https://www.amazon.com/dp/B07VXTMSCL/ref=dm_ws_tlw_trk14
I've been stoked for this to be officially released, just wanted to share more options for others.