Currently the official developers don’t own that device so they would need to purchase it, create and test builds, and then it would become “Official”. I think this device is high in their list of “next to support” devices, but of course no specific “ETA”.
I know there are a few users using my “Unofficial” builds on a Pixel 9. All should work that I know of, but you won’t be able to re-lock the bootloader, and you will have to manually apply monthly updates as I release them.