Why are my posts not indexed?

1. Make sure your site's robots.txt contains your superblog's sitemap.xml.

For example:

yourwebsite.com is your main website.

yourwebsite.com/blog is your superblog.

yourwebsite.com/robots.txt should contain yourwebsite.com/blog/sitemap.xml.

if you blog.yourwebsite.com is your superblog, then

yourwebsite.com/robots.txt should contain blog.yourwebsite.com/sitemap.xml.

2. Make sure you added your website (including subdomains) to Google Search Console.

3. Sometimes Google decides not to index pages which have low quality content. Make sure your content is good quality.