When I was setting up my Wordpress based site, the native blog post type (posts) didn't offer the structure and features I was after, so I created my own custom post type (library) with additional taxonomies and tags for publishing articles.
I now have lots of active and indexed articles of the custom post type, but none of the blog type. As a result I'm getting notifications from Yoast saying, "you have not yet published a post. Publish your first post".
My question is: does it matter for SEO if I use the native blog post type or custom post type for publishing articles?