I set up a macro that allows you to generate a pdf from a multi-tab layout: 1 first pdf for all the tabs + 1 pdf per tab.
I encounter the following problem with plans with 1 3D view: the global pdf is ok, on the other hand on the tabbed pdfs, the 3d views have disappeared.
I've already encountered the case where when I was generating 3D pdfs I had no view, I changed the version of adobe and if the problem persists, try with a viewer like foxit reader for example.