Is this a feature? I can’t seem to find it anywhere.
Yes, it’s possible. Well described in this guide:
You’d want to select “send” in the top of the publish menu:
I don’t want to send emails to subscribers… I want to write the article or post on my computer…email it to my ghost blog and have it auto publish.
Wordpress and Posthaven have that ability. Does Ghost?
Ghost has Admin API with all kinds of ways to accomplish this. Might be a good idea to play with some Zapier integrations to accomplish this. There’s nothing like this available out of the box.