I have followed the guide on how to configure Nest to the letter 
and I get the below, no entities found. I’ve followed the guide twice and I am getting the same result.
I’m just going to repeat what I said to somebody else.
Delete it all and start again.
You know the hoops to jump through so it should be quicker, either you made one tiny mistake or the Google magic cloud (sarcasm) hasn’t made some association.
I think the first time I got to where you are (I think it showed up but had no entities as well) I had messed things up 20 times getting to the UI accepting my login, I probably copied something wrong somewhere.
When I deleted everything in the SDM and Action Console (for this not my Google Home integration) it worked almost immediately.