Complex sentence: On Christmas Day, Abstract's debut project MTV1987 debuted on iTunes and Apple Music despite the project had been out for over a year and a half already it hadn't yet officially been available on Apple's platform until that point.
Split into simpler sentences: On Christmas Day, Abstract's debut project MTV1987 debuted on iTunes and Apple Music. The project had been out for over a year and a half already, but hadn't yet officially been available on Apple's platform until that point.