They are not making a "GrapheneOS smartphone", they are just helping providers make their new devices compatible with the security requirements, so GrapheneOS can be installed on it. But GrapheneOS will not come by default AFAIK.

It's totally possible that there will be an option to buy the device with GrapheneOS preinstalled https://grapheneos.social/@GrapheneOS/114749924008111970

It better not be Samsung...

It isn't Samsung

I'd love this for a Fairphone.

It definitely won't be Fairphone. See https://discuss.grapheneos.org/d/24134-devices-lacking-stand...

https://grapheneos.social/@GrapheneOS/115379774100353715 and

https://grapheneos.social/@GrapheneOS/114874684738751793