It may refer to his renowned ability to freestyle over any beat, where the specific track "doesn't matter" because of his natural talent for improvisation.
The phrase typically refers to a backing track created by a music producer in the style of the late rapper Juice WRLD , intended for other artists to use for recording or practice. (FREE) Juice WRLD Type Beat "Doesn't Matter"
In the context of the music industry and fan communities, the term "Doesn't Matter" could relate to a few different topics: It may refer to his renowned ability to