I have a standalone dashboard that I select from the sidebar when I want to view it. I have decided to add it as a view to the several other dashboards I have. While I can open the standalone dashboard and select to move it to the other dashboard as a view, this deletes the original standalone dashboard. It would be handy to have a copy function either instead of move or in addition to move. Right now I have to copy and paste to recreate the original standalone dashboard in order to move it to the next dashboard as a view. I’m sure there is a more direct method but I have not discovered it.
Maybe this can help with what you’re trying to do?
New Custom Card: Embedded View Card – Embed any view into another - Share your Projects! / Dashboards & Frontend - Home Assistant Community
I have a few ‘modules’ that I created in a separate dashboard and call on with this card in order to avoid duplication.