Hello,
We apologize for the issue you are facing with your Rank Math sitemap not updating correctly. Here are a few steps you can take to troubleshoot and resolve this issue:
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Ensure Your Posts Are Set to Index: If your posts are set to noindex, they won’t appear in the sitemap. To check this, go to Rank Math SEO → Titles & Meta and ensure that the Index checkbox is enabled for your posts.

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Flush Permalinks: Sometimes, flushing permalinks can resolve sitemap issues. Go to Settings → Permalinks in your WordPress admin area and click the “Save Changes” button without making any changes.

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Check for Plugin Conflicts: Use the Health Check plugin to identify any potential conflicts with other plugins that might be affecting the sitemap.
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Validate Your Sitemap: You can validate your sitemap using the Validate XML Sitemap tool to ensure it is correctly configured.

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Check Robots.txt File: Ensure that your robots.txt file is not blocking any of your posts from being indexed. You can check this in Rank Math SEO → General Settings → robots.txt.
If you have followed these steps and are still experiencing issues, please reply to this ticket, and a human agent from the Rank Math Support team will assist you further. Thank you for raising this concern!
Sources:
Troubleshooting the “Couldn’t Fetch” Error in Google Search Console » Rank Math
Rank Math Sitemap Issues and Their Fixes » Rank Math
Hello,
We checked your sitemap and we can see Rank Math has added all the URLs there.
Regarding the ‘Discovered Pages’ on the Google Search Console only shows the number of pages that were discovered using the sitemap, and since the sitemap is not the only tool Google uses to discover pages, the number of ‘Discovered Pages’ might differ from your number of pages on your sitemap.
Hope that helps and please don’t hesitate to let us know if you have any other questions.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.