However when scheduling posts, nothing shows in the Buffer queue
Correct and expected behaviour, noting the status will show in the Buffer queue and log when the WordPress scheduled post becomes published.
If you believe your published WordPress Post is not in the log or the Buffer queue, feel free to provide a brief screencast / Loom video walking through the settings and steps taken to publish a WordPress Post.
Thanks for your quick reply. The plugin description had me thinking that posts would be sent to the Buffer queue when scheduled.
Automatically share Posts, Pages and Custom Post Types to social media when scheduling, publishing or updating your WordPress content
Ideally, I want the WP post and social posts to go live at the same time at some future date. Is this not possible?