Elements Positioning missing

Hi there,
I wanted to add featured image to be visible (in oceanwp), but when I went to blog/single post/elements positioning I do not see it any more, everything I selected earlier as “invisible” is gone, I can see only few things I left “visible” (little eye ON). I wander where invisible parts are to be found and activated as vissible. This is strange since I use oceanwp in my other site too, there I can still see them in the row, only they are marked as invissible, but I can activate them if I wish. Here not, they are completely gone. How can I see them again to activate them if I wish? I could send a foto if that would clear up my question.

Thank you very much, best regards,

The page I need help with: [log in to see the link]