The RT done by Eevee Next is not something so sophisticated. It is screen space ray tracing, something that has plagued has been used by most game engines over the past decade. It depends on what is currently being displayed on your screen.
It won’t benefit from dedicated hardware cores or Metal 3, as it is not that type of raytracing.
Hopefully Eevee Next’s architectural rewrite and use of modern APIs such as Metal and Vulkan will eventually make this kind of things possible, though 