Why was the operation not approved?

As shown in the image, the action was not approved. I am quite confused.

This post is publicly accessible. However, it appeared in the moderation queue, which feels awkward. How can I approve it?

What was the reason given for the flag?

Flagged asNeeds Approvalby system·17 hours

New user typed their first post suspiciously fast, suspected bot or spammer behavior. See first post typing time.

User (user deleted)

Is it because the post was deleted by the user that the operation failed?