For guidance on managing the visibility of your Microsoft files and content, visit the Review the visibility of your online files webpage.

It provides information on how to check who has access to your files, so you can adjust your sharing settings as needed.

Remember, how you’ve set up your Microsoft Teams or Office 365 Group will determine who has automatic visibility of the files and content within it.

Using Microsoft's reporting feature helps you to keep track of access and make informed decisions about your sharing settings.