Currently the automatic Sitemap XML generates the home page as <url>
<lastmod>2020-11-25T04:03:25+00:00</lastmod>
<priority>1.0</priority>
</url>
Could you update the sitemap generator to show the home page as the root url instead "/"?
<url>
<lastmod>2020-11-25T04:03:25+00:00</lastmod>
<priority>1.0</priority>
</url>