Short version:
This new Microsoft Teams release will make it easy to tell which folders within your SharePoint library have a Teams channel associated with them. Additionally, you’ll be able to see this right from within the SharePoint user interface. This new feature will roll out to Teams desktop and web late May to late June.

Details
This new Microsoft Teams release will make it easy to tell which folders within your SharePoint library have a Teams channel associated with them. Additionally, you’ll be able to see this right from within the SharePoint user interface. This new feature will roll out to Teams desktop and web.

This shared association between Teams channels and the corresponding SharePoint folders will help eliminate confusion across all Microsoft 365 endpoints. In addition, it will provide greater clarity allow you to easily move from a SharePoint folder directly to the corresponding Teams channel. To maintain this association, you will not be permitted to rename and delete any folders within your SharePoint library that have an associated Teams channel.

Availability:
Rolling out late May to late June.