Currently, when using any of the Excel actions in Power Automate, you cannot see any files or folders that are stored in the SharePoint document library of a Teams private channel. You CAN see files or folders associated with any of the public channels ONLY. For those unfamiliar, when you create a channel in a Team and mark it private, Teams automatically creates a stand-alone SharePoint site with its own document library. You can use Power Automate's SharePoint connector to do various actions on items in that SharePoint site/library. The Excel actions, however, are blind to it. From an excel action, you cannot seem to access anything in those private channels' libraries at all.
