I have a flow which is triggered by a list item being created and will create a matching folder in a SharePoint document library based on the name of the list item. The folder is created with the CreateNewFolder action for a SharePoint connection. The ID property of the response (not the Identifier property) is then saved to the newly created list item in a hidden field. The item in the list and the folder in the document library must always be linked or have some reference between them.
In a second Flow, I'm trying to select that same folder using the stored ID property but it seems like the Identifier property is required for all the actions I've found. Since the Identifier property appears to be based on the location and name of the file, and a user can rename a folder in the document library, I cannot use the Identifier as a reference between the item and folder.

What are my options to store a unique ID of a folder which can also be used to select that same folder in another Flow?