My blog is not on the root of my domain, any way to add the root to the sitemap?

Hello,

I have a single-page website with a blog attached to it. The single-page website is located at https://www.example.com/ while the blog is located at https://www.example.com/blog/. Before adding the blog, I didn’t need a sitemap for the website. However, now that I do have a blog, I think it would be beneficial.

I set up the nginx rewrite config so that the sitemap is on https://www.example.com/sitemaps.xml, but I am wondering if there is any way to add https://www.example.com/ to the sitemap.

Any help is appreciated.