Adding Schema to Blog Posts that are under 'a' rather than the folder icon

I am attempting to add schema to blog posts on my clients website through squarespace. When I am on any other pages (treatments, pricing, help centre) I can see the area to add it. However, their blog is set up differently as the icon next to it is 'a' not a folder and thus I am not getting the same option to add code when I click edit on the blog posts. Is there a way around this so I can still add the schema to the blog posts? I have attached an image for what I mean about the blog being set up as 'a' rather than the typical folder icon next to the other pages.  

Hover on Blog Page > Click Gear icon > Advanced > Add code there (You need Admin Permissions to able to see gear icon)