We cannot get room temperature displayed on a Nest Hub. Apparently, there is an sensor for room temperature, but it is only use as part of the sleep sensing feature:
Thanks for posting here in the Community forum.
I'm grateful for your help, @MplsCustomer.
@LapElectricInAz, I want to follow up on your inquiry. Google Nest displays only show time, air quality and weather on its screen at the moment. If you want to get room temperature added, we can raise this to our team. We'd appreciate it if you could send this as feedback, which will be directly received by our product engineers. Check out this article on how you can share your feature request.
If you have other questions in mind, let me know; otherwise, I'll be locking this thread in the next 24 hours.