I have configured WP Twitter Auto Publish to publish posts content on Twitter.
Unfortunately there are no options in the menu box on the post editing page.
It seems like you have selected specific category auto publishing ,so the metabox in edit page will appear only when you select that specific category.
Edit :With the gutenberg editor ,specific category logic for showing the metabox of an already selected category on page load is having an issue,so we will fix this bug and update the plugin as soon as possible.
Thank you.