Exactly. The Atom feed of my website declares an XSLT stylesheet which transforms it to HTML. That way it can be served directly to, and renders prettily by, a web browser (see https://paul.fragara.com/feed.xml). For the curious, the XLST can be found here: https://gitlab.com/PaulCapron/paul.fragara.com/-/blob/master...
Btw, you can also apply an XSLT sheet to an XML document using standard JavaScript: https://developer.mozilla.org/en-US/docs/Web/API/XSLTProcess...