Hello,
Here is an article about a little trick when synchronizing documents from a Microsoft Teams Team.
The Teams interface propose you to synchronize documents from a channel, so you can end up with distinct synchronization for each channels. If you want to synchronize all the documents from a Team, you can navigate to the Team’s SharePoint site and select Documents from the left navigation. This will let you see every channels as a folder :

While using this trick, there is two important point to take in considerations.
First, you will only synchronize standard channels’ documents. Private channels are stored in a dedicated SharePoint Site.
Second, when you rename a channel in Microsoft Teams, the folder in the SharePoint site will keep the initial name. So rename channel wisely or create a new one if possible 😉.
I hope you found this tip useful, see you soon in the blog section !