You can create a Microsoft Teams from a SharePoint team site as below:
- Navigate to a group-connected team site you own
- Select Add real-time chat in the lower left corner of the home page of your team site.
- Select Add real-time chat to open a panel that walks site owners through a quick tour about the value of adding Microsoft Teams capability to their SharePoint sites.
- Select Continue to view options to add SharePoint resources as tabs in Teams. Select SharePoint pages, news posts, lists, and document libraries to add to Microsoft Teams that enables your team to work in one place.
- Select Add Teams to create your new Team channel that contains the selected resources as tabs.
- Find the resources you selected as tabs in the General channel of your new team.
- A link to the Teams channel now appears in the site navigation of your SharePoint team site.
For more details, please pay attention to Create a Microsoft Team from a SharePoint team site part in this article.
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