Even though this question was from a while ago, I’ve seen it being asked several times now.
I just found a workaround:
I have a “Dashboard - code” page, which is just your normal Dashboard note.
Then I have a “Dashboard” page, where I embed the “Dashboard - code” (![[Dashboard - code]]) and that’s it.
The Dashboard can be edited by hovering over the link and using the hover edit plugin. Or just go to the Dashboard - code page and edit it there.
It’s not ideal but that way I can stay with Live Preview mode on every page and still access the dashboard like a preview. I previously tried with the force view mode plugin but that always got me into source mode instead of live preview, when I switched to another note.