Do not use
h1-h6to mark up Subheadings, subtitles, alternative titles and taglines in<hgroup>, use<p>elements.
Whether the semantics of the <hgroup> and the specifics of child <p> elements are to be conveyed to users is a decision for the assistive technology developers in consultation with their users. What browsers can and should do is ensure that unambiguous semantics are exposed in the accessibility tree.
URL: https://www.tpgi.com/subheadings-subtitles-alternative-titles-and-taglines-in-html/