Thereās neutral individuals of course. But when it comes to the Elves who are sided with the factions weāve seen no proof of that.
Thalassian Elves in the Alliance (non void) are always referenced to as High Elves.
Thalassian Elves in the Horde are always referenced to as Blood Elves.
As for āWhat High Elves call themselves Void Elvesā Thereās High Elf wayfarers showing up in Telogrus so thereās High Elves going to study the void there.