I have created 6 different custom post type, each having different post meta and taxonomies associated with it. I am displaying all different custom post types in a dropdown using get_post_types() function, Now, onchange of dropdown, I want to display associated meta fields and taxonomy.

I know that this information is not saved in DB unless a post is created, so is it possible to read this information like WordPress is reading or please suggest me if this is possible or not.