Here's the story:
#Instagram is working on the ability to add a song to your profile ???? pic.twitter.com/zX2jIlZLzc— Alessandro Paluzzi (@alex193a) October 17, 2022
No official word from IG on live testing, or if the song will autoplay when you visit a profile, or if it will ever even roll out in the live environment.
We'll keep you updated on any progress.