I have a Pixel 10 Pro XL, and honestly, it’s quite surprising that months after launch there’s still nothing concrete beyond the official factory images.
It’s becoming pretty clear what direction Google is taking with AOSP — it’s less Android Open Source Project and more Android Closed Source Project now. Removing device trees and delaying AOSP pushes makes it harder for independent projects like GrapheneOS to support new devices in a timely way.
If you really want to use GrapheneOS right now, your best option is still to go with a Pixel 9. The Pixel 10 line might eventually be supported, but it’s obvious Google isn’t making that easy anymore