It was mentioned multiple times that the Void Elves are not recruiting, how ever, that any Blood or High Elves out there looking at joining them are free to openingly join them. We know that part is canon lore. As for how many have joined them, we do not fully know.
As for the High Elf Wayfarers, and this part is just speculation, not lore, maybe they have gone and adopted the name of Void Elves. Though don’t fully know so can’t say much of them.
But the fact is, while people have been requesting for them, Blizzard has always stuck by the stance, even at the peak of the High Elf debate long before the Void Elves were added, Blizzard has always held the same stance. Then they added Void Elves, yes, people still requested, but some of the High Elf community moved on. Then they added Customizations in Shadowlands in form of Normal Skin tones and more hair colours in 9.1.5, and the vast majority of the High Elf community fully moved on, myself included.
Because the stance is clear: Blizzard does not want to go down that route. As for what reason as to why, all I know is that because Blood Elves are already playable, but maybe there is more to the stance than what we’re really being told. But the point is, Blizzard has already made there stance, and they have offered a way to compromise with the Void Elves, and when customizations were added, people ended up stopped, and moved on, making people happy at the same time.
Because truthfully, they are going to go down the route when the Blood Elves are on Horde. Which is why customizations are a better option to continue requesting, which a lot of us would advocate for. As for Class/race restrictions, don’t know why Blizzard has stopped with Warlocks, but I hope they also include other classers soon.
As I said, the better option to go after is customizations, because it is clear what Blizzard is doing, and continuing pushing for High Elves isn’t getting us anywhere anymore.