The post is about the overall launch of the device, not only official GrapheneOS support for it. They have their own OS with Google Mobile Services. They've made sure the device will meet all of our requirements and are helping us develop and maintain support for it. It's not the main OS for it.
I have a few questions if you have a second: Is this post about the overall launch of the device, or only official GrapheneOS support for it? Do they have their own OS with Google Mobile Services? Have they made sure the device will meet all of your requirements and are they helping you develop and maintain support for it? Will GrapheneOS be the main OS for it?