Some Teams features are part of the preview for Teams Premium and will move from Teams licenses to Teams Premium licenses. Each of these features has a grace period of 30 or 60 days after general availability. When the grace period expires, users will lose access to that feature.

The features that are currently in preview and will be moving to Teams premium are:

• • Live translated captions (to be disabled in April).
  • PPT live chapters.
  • Timeline markers in Teams meeting recordings for when a user left or joined meetings.
  • Custom organization Together mode scenes.

For more information, please read this overview from Microsoft: How does Teams Premium compare to Teams?