Hello,
Thank you for contacting Rank Math today.
We recommend that you only submit your main sitemap, sitemap_index.xml. The other sitemaps are included in this and will be crawled in the same way.
However, to avoid issues when submitting the sitemap URLs, if you have any caching setup on your site, please look for where to exclude URLs/Pages from being cached and add your sitemap URLs.
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.