As spotted by 9To5Google, the new UI that was exclusive only to the unreleased Nest Hub Max has begun rolling out to the Nest Hub and third-party smart home devices.
Since 2019 Google I/O a few weeks ago, the company has been rolling out new features to consumer smart displays like more clock options and an easier way to access Routines. The Nest Hub Max, which debuted at the conference but isn't expected to hit the market until this summer, was powered by an updated version of the Google home device user interface.