Teams - Are all my files visible on Teams Files

The files that you store in your OneDrive are typically only visible to you via the Recent files list. If you share files with others from your OneDrive and your peers view or edit them, then those individuals would see those files in their Recent file list.

You are seeing files in your Recent file list that were created by your peers because you have recently viewed or edited them. You can find out more information about the Files list in Teams here: https://support.microsoft.com/en-us/office/explore-the-files-list-in-teams-287ba970-2bdf-473d-a2da-76247ea4cf8f#:~:text=Select%20Files%20on%20the%20left%20side%20of%20Teams,cloud%20storage%20services%20you%27ve%20connected%20to%20Teams.%20.