I'm in the same waiting boat still on June 27.
I switched my unlocked Pixel I bought directly from Google, from Verizon to Project Fi last month.
I'm concerned that because I am running a Verizon build of the OS that the update servers are rejecting my device update requests now that I'm on a different carrier. I hope that's not the case.
Google support and Fi support haven't been able to give me an answer other than refer me to manually flash my phone with the update. My device appears to be one of the batch of Pixels with the intermittent freezing issues. Though support wants me to park my device in safe mode for a few weeks to see what happens.
Nobody has time for that.
Alas, I'm hoping that contacting support will jump start the process.
If all else fails, I can hope I get a massive rollup pushed to my device with the July update...