I know this post is old-ish, but I’m facing the same issue and everywhere I look the recommended “solution” is “Make better content”, submit the sitemap or “It takes time, your website is new”.
It’s slowly getting annoying because I can make a website with 2 lines of content on it in NodeJS and that website will be listed on the google search engine within the day. (eg: https://deepinspeech.com/ has no links, no content, nothing and I got it on google within hours of publishing)
We’re paying a decent amount of money (Ghost pro) and Ghost can’t even provide more help than “it’s the writer’s fault”?
This is tiring.