It's possible that "it does not require ray tracing" means that it does not require extensions like RTX. Perhaps it uses voxel cone tracing, which you may say is technically not ray tracing, but if you called it ray tracing you wouldn't exactly be wrong either.
I would call it Sphere Tracing since that's what it's called in "Hart, John, C; Sphere Tracing: A Geometric Method for the
Antialiased Ray Tracing of Implicit Surfaces; The Visual Computer-1995"
