Additional team and channel-related features and issues within Microsoft Teams for Education
Hi Doris,
Based on your information, may I ask whether this issue just happens recently and appears on Teams desktop app only while the web version still works properly?
A few days ago, there is an user reported a similar behavior that Tabs disappears on a channel in Teams desktop app. You can take a look in this article to see if it's truly the same behavior as you're experiencing Documents partagés dans un canal Teams - Microsoft Q&A. If yes, please try my provided troubleshooting steps to see if it helps resolve the issue in your case.
Unfortunately, the source is currently in French and does not provide a Spanish or English version. Therefore, I recommend using a reliable translation tool or service to clearly understand the contents.
Should you have any further questions or need additional assistance, please feel free to share them in the comment below. I'm very happy to help.
Note: Please follow the steps in the forum documentation to enable e-mail notifications if you want to receive the related email notification for this thread.