Hello,
Thanks for contacting us and sorry for any inconvenience that might have been caused due to that.
I checked your sitemap and it’s working fine. However, in your robots.txt file, your sitemap URL is set as sitemap.xml while Rank Math uses sitemap_index.xml.
Please edit your robots.txt file from WP Dashboard > Rank Math > General Settings > Edit Robots.txt and set the correct sitemap URL. The remove all previously submitted sitemaps from your GSC and resubmit your main sitemap(https://yourdomain.com/sitemap_index.xml) and wait for Google to crawl your sitemap.
This should resolve the issue. Let us know if it doesn’t. We are here to assist.
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.