Hi @himanshu2021
Would it be possible for you to provide us with a link to your sitemap index?
Please note that the Yoast SEO plugin generates a sitemap with the URL of /sitemap_index.xml and not /sitemap.xml (it should redirect it to /sitemap_index.xml, if ever) – https://yoast.com/help/xml-sitemaps-in-the-wordpress-seo-plugin/
If you have any 404 error issues and the sub-sitemaps or main sitemap isn’t loading as expected, you can also refer to this article – https://yoast.com/help/my-sitemap-is-giving-a-404-error-what-should-i-do/
We are going ahead and marking this issue as resolved due to inactivity. If you require any further assistance please create a new issue.
