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Hello @harshlahre,
Thank you for your query and we are so sorry about the trouble this must have caused.
As per your screenshot, Google have already processed your sitemap successfully so it is safe to say that your sitemap is working perfectly fine. It is just all the URLs are not yet discovered or crawled via the sitemap.
Please note that your sitemap is just a backup crawling mechanism for the search engines. If the URLs are not discovered via sitemap, then it may have been discovered by other means such as internal linking.
We can confirm that 20 of your URLs are already indexed on the SERP: https://i.rankmath.com/i/wnibLu
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.