Occasional Contributor

I managed to create channels in Teams connected to Sharepoint site.

However creating a channel - or in this case document in Sharepoint site did not make a channel in Teams.

It is maybe not possible to make it both ways?

Channels are created only from Teams. You can view their folders in the SharePoint site and if you add a subfolder to it in SharePoint, the subfolder will also be visible in ”Files” in the channel.