The first song that Joony ever recorded in 2014 was a flip of Mac Miller ’s Faces cut “Diablo.” And his 2015 single, “Funeral,” eventually picked up some steam as well on SoundCloud.

Joony makes his first appearance on the Billboard Hot 100 chart (dated July 23), thanks to his featured credit on Brent Faiyaz’s “FYTB,” which debuts at No. 97. “It’s such a beautiful ...