https://learn.microsoft.com/en-us/azure/logic-apps/logic-apps-using-file-connector
Creating a new folder or subfolder directly on an on-premises file share from Azure Logic Apps isn't explicitly supported by the File System connector. The connector's capabilities include creating, getting, appending, updating, and deleting files, as well as listing files in folders or root folders, and getting file content and metadata. However, it does not provide a direct action to create a new folder or subfolder.
However, a workaround can be employed using the "Create File" action in Azure Logic Apps. When you use the "Create File" action and specify a path for the file that includes the new folder or subfolder you need, Azure Logic Apps will create any folders in the path that don't already exist. For example, if you specify the path as /newFolder/newSubfolder/newFile.txt, Azure Logic Apps will create newFolder and newSubfolder if they don't already exist, then create newFile.txt in the newSubfolder.