Report tags are based on work period start/end dates. You can always set that within the report viewer or pass these details within an entity screen to get the information you want. If you don’t want to consider dates or work period sales data you can build your report using SQL to directly query the database.
For SQL you can either use this through Automation-> Scripts or build an in-line sql query on a report such as {REPORT SQL DETAILS}. Here are a few things to look at, the first one looks at the inventory table. I would be of more help if I actually tracked inventory.
https://kb.sambapos.com/en/9-1-2-creating-custom-reports-with-sql/