Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
Can you please share the sitemap URL with us?
Also, add this filter to your website and see if that fixes the issue:
add_filter( 'rank_math/sitemap/enable_caching', '__return_false');
Here is a guide you can follow to add the filter:
https://rankmath.com/kb/wordpress-hooks-actions-filters/
Once done, clear your website cache and check the sitemap.
We look forward to helping 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.