To keep track of upcoming changes, including new and changed features, planned maintenance, or other important announcements, go to Message center.
I pay a lot of attention to message center notifications about new features posted to the Microsoft 365 admin center. I know many other people are diligent in their reading of these posts too, but it seems like many others ignore the flood of information posted by Microsoft.
https://office365itpros.com/2022/04/05/message-center-notifications/