Hello,
Thank you for contacting Rank Math today.
Your site is a non-WWW and therefore the only sitemap that will determine your site crawling and indexing is yoursitedomain/sitemap_index.xml.
Since you have redirected your WWW to the non-WWW, the WWW version is also being generated but it will only reflected your non-WWW sitemap URLs. It however seems to be cached but if right click and view page source, you will see your sitemap URLs are actually added.
Looking forward to helping you. 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.
