how i can change sitemap url ?

Can you please elaborate more what URL in sitemap you’d like to change?

Now url is
Mydomain.com/sitemap_index.xml

I want to change it to
Mydomain.com/hidenurlmap.xml

@fara-marz Unfortunately, there is such option available to change the sitemap_index.xml to something else.

I have replaced all sitemap_index.xml by newsitemap_index.xml but it not working! How can I change It?