API is not returning post Name value

[Arkshine]

post_stream → posts returns the first 20 posts. You can use ?page= query.
post_stream → streams returns all the topic post IDs.

Additional guide if you want to get specific posts:

Fetch All Posts from a Topic Using the API

This is a how-to guide explaining how to fetch all posts from a topic using the Discourse API The results returned by the Discourse API for many routes are paginated. For example, the API endpoint for “Get A Single Topic” - Ex: https://examplesite/t/{id}.json will only return 20 posts by default, even if the topic contains more than 20 posts. Due to this behavior, there are two ways you can use the Discourse API to fetch all posts for a topic using the .../t…