To find out why it's iffy, I asked an AI assistant and got the following (in the summary). Do you agree?

The "iffy" status reflects temporary development hurdles rather than a shift in Google’s openness to custom operating systems.

(Google delayed releasing the necessary source code to AOSP).

I get that this could indicate that they are dropping support in the future. But it seems to be fine, albeit delayed, for the Pixel 10?