Depends on the version you are using. I think there was a fairly recent update which does it very differently than the previous ver. In fact, following these instructions I found, I have not succeeded in a satisfactory export like the previous version produced.
Here are the instructions ..... that don't work for me.
https://support.lastpass.com/s/question/0D5TP00000CyLFo0AN/can-no-longer-export-to-a-pdf-file?fromEmail=1&s1oid=00D8c0000083aEV&s1nid=0DB8c000000bxG7&s1uid=0058c00000E9v3v&s1ext=0&emkind=chatterCommentNotification&emtm=1715482267427&emvtk=dby7D_ryV3jUy5ykr3ksnCkGfm23NxJt7AhrovtE6WM%3D
