Also wanted to mention I have tried options of Factory reset, recovery
as mentioned.
https://support.google.com/googlenest/thread/111194794/og-nest-hub-bricked-or-broken?hl=en&msgid=123225610
Google team, I am facing same issue with my nest hub stuck at grey G
screen. It's a first gen hub. But it was working perfectly fine until
just 5 days. So many people are facing this issue.. please actively
share a solution. All as a Google community...