I just searched for it a bit, but all the sources I could find (twitter, pinterest, BlueSky) also don’t say where it’s from, except that it’s a flute piece.
I had the same problem finding the source of a gif where people on a beach tore off their own skin and flesh like they were clothes. First time it was posted was by some Spanish dude on Pinterest in 2010.
Years later I came to find out it was in a music video called The Killers - Bones.