Hello @null_null Are you referring to recovering a hidden chat? You can do a keyword or person search in the search bar at the top of the channel and you should be able to see what was hidden. Not sure how to recover deleted files, if possible.
Once the message is deleted in a private chat, an end user does not have a way to recover. In regards of files in Teams, you can recover them from the recycle bin in the underlying SharePoint Site
@Juan Carlos González Martín I accidentally deleted an Excel file in MS Teams today. I looked in Sharepoint, and can't seem to locate anything about restoring library. Any suggestions? Thanks in advance.
Where did you delete the file: in a private chat or in a channel? In a private chat, you have to take a look at the recycle bin in your ODFB. In a channel, ask a Team Onwer to take a look also to the Recycle bin
