I have published 21 posts and only 13 appear on the sitemap

We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:

https://wordpress.org/plugins/temporary-login-without-password/

You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):

https://wordpress.org/plugins/wp-security-audit-log/

We really look forward to helping you.

Hi Roberto,

I checked one of the posts not included in the post sitemap and you had selected an incorrect URL as the canonical URL which was causing the post to not appear in the sitemap. I am talking about your la-causa-de-todas-las-enfermedades/ and I have removed the canonical tag for you which fixed the issue and included the post in the sitemap.

Please do the same for the rest of the posts not included in the sitemap.

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.