My document flow I use cabinets to track documents in the shipping process.
There are new documents in the first cabinet.
The second one contains documents to be signed.
In the third one for shipping.
In the fourth it was sent, waiting for confirmation of receipt.
In the fifth, the documents have confirmation of receipt attached. There are documents in the sixth cabinet after the confirmation has been downloaded.
Each employee has his or her own locker with six subcategories.
Now he has to click on each one in turn to check where the documents are. You could add the number of documents in a given cabinet as a number, just like it is done with tags. Alternatively, the icon may indicate whether the cabinet is empty or has any documents.