Depending on what your organization's Office 365 subscription includes, the Dashboard in Security & Compliance includes several widgets, such as Threat Management Summary, Threat Protection Status, Global Weekly Threat Detections, Malware, etc. It does not display a list of the features that were recently updated in the tenant so this solution does not meet the goal.
To meet the goal, you need to use Message center in the Microsoft 365 admin center.
Reference:
https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/security-dashboard
https://docs.microsoft.com/en-us/office365/admin/manage/message-center?view=o365-worldwide