I know that it seems like a lot of work to name all your viewports,…
Vectorworks Tip 377 – Linked Viewports – Concept
The concept is that you can create a reference object in your plans, sections, or elevations, and link this object to a viewport (maybe a detail) on a different sheet layer. When you update the number of the detail or move the detail from one sheet to another the drawing reference will update in the original plan, elevation, or section. You can link multiple reference objects to one viewport. That way, when you move or renumber the detail, all of your drawing references will update.