Can Frontend Submission check an options page (MB Setting pages)?
In the sense, can I create a settings page and have it frontend controlled with the MB Frontend Submission extension?
And if it is possible, what is the shortcode that I have to use?
It is impossible, the extension Frontend Submission supports to create the post, fields in the frontend, and the field value is saved in the database as the post meta (table wp_postmeta) while the Settings page saves the field value in the database as the theme option (table wp_options).