Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
If you have any caching plugin, please exclude your sitemap URLs from caching and purge your site cache then do the following:
1. Head over to WordPress Dashboard > Settings > Permalinks
Hit the save button once.
2. Go to WordPress Dashboard > Rank Math > Sitemap Settings and change links per sitemap to a different value such as 201/501/1001/2001. This will force the sitemap to update. Hit the save button once.
That should fix the issue.
You can test your sitemap in a private browser to avoid browser caching.
If the issue persists, let us know so we can investigate this further.
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.