Include 'first post' setting for embeds. (Or better: 'create topic' embed)

I’d love the embedding-feature to include an option, that allows you to also show the first post of a thread in the embed.
This feature makes sense, because you can already list topics based on categories or tags and you can also embed an already existing topic. Because of this combination, there should be the possibility to include the first post in the embed, or even better embed a full “create topic” workflow.

A valid use-case under a blog article to have multiple threads connected to the article:

A ‘create thread’ button that links to discourse with the hint that you should use a certain tag in order to ‘connect’ the thread to the blog article.
A list of threads with the tag connected to the blog article.
If you click a thread in the list, it will open the thread as embed, including the first post.

I realize that there already is a plugin including the first post, but I think the setting should be in there by default.