Add reference number to shape or note object

In order to cross reference steps in a journey map or ideas on a board to other materials (google doc, spreadsheet, figma file, etc.) It would be helpful if there was an easy way to assign a unique number to an object (card, shape, sticky, etc). This could show up like a tag type or page number and be displayed similarly to how authors are displayed. For example, if a journey map had a box showing the step Log in, It could be numbered A.1 - Then if there is a spreadsheet or design file, There would be a precise way to track it, even if the language changed (such as from Log-in to Authenticate) or if there were multiple “steps” with the same name in different phases.