Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
As you have submitted two sitemaps(index and post), Google has crawled all 85 URLs of the post sitemap and 67 URLs of the index sitemap.
Google crawls the sitemap and website according to the crawl budget of the website. It is possible that the crawl budget for your website is exhausted and Google is not able to discover the URLs within your index sitemap.
Please exclude the sitemaps from caching and remove the sitemaps from the Search Console and submit only the sitemap_index.xml for Google to crawl and index the website efficiently.
I hope this helps. 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.