Sitemap Problem HELP

Hi, im using wp download manager plugin for publishing posts! I’ve more than 350+ urls in wpdmpro_sitemap.xml generated by rank-math! When open sitemap_index.xml in my browser wpdmpro_sitemap.xml showing but when i check that in search console not showing, recently published posts are indexed & not submitted in sitemap! I’m using wp rocket i also tried to exclude sitemap.xml but not working i tried 3rd party sitemap plugin there also same problem. Please help me to fix this problem. Thanks in advance!

Showing in sitemap_index.xml

Not showing in search console

Check this

Sitemap validation result