Thanks for the fast response.
I just tried entering “post” for “If Post Type is” and it is not showing either. As far as I understand, that box should contain the list of post IDs?
However, I tried the setting “everywhere” and it works. For our intended use (share/like buttons), it’s preferable to display for all posts and not static pages or category/tag word pages.
I have tried to use “if page is not”=[empty], with the intention of excluding all static pages, but it seems to work the same way as “everywhere”, i.e. shows up on posts, pages, category, tag word pages.