PlayStation VR2 preorders currently appear to be open to everyone with a PlayStation account, no special invitation required. When preorders first opened last month, you had to register ahead of time and then be selected by Sony to be able to put an order in for the PSVR2. But as of this writing, you can preorder Sony’s next-generation VR headset from the PlayStation Direct website and get it within a week of its February launch.
I actually discovered this on accident Thursday night. I had registered for the preorder but, to my disappointment, never got an email. I figured it was a sign from the universe ...