Hello,
Thank you for contacting Rank Math.
Please make sure that the sitemap is submitted in the Search Console.
You can follow this guide to submit the sitemap:
https://rankmath.com/kb/submit-sitemap-to-google/
Please note that crawling and indexing depend on the crawl budget of your website. You need to wait for Google to crawl the website.
You can request indexing for the URLs using the URL inspection tool in the Search Console.
I hope this helps. Looking forward to helping you.
I have done this as well, successfully. The previously submitted sitemaps were not able to be fetched.
Hello,
It looks like the sitemap is getting cached. I checked it, it is returning a blank page.
Please follow this guide to exclude the sitemaps from caching and then re-submit the sitemap:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
You should wait for Google to recrawl the sitemap and website.
I hope this helps. Looking forward to helping you.
OK did this as well (I use W3 Total Cache) Thanks!
Hello,
I checked the sitemap, it is working fine now.
Also checked the website using the site operator on Google, 1 URL in indexed:

Please wait for Google to recrawl the website and index the other pages.
Looking 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.