I have found it difficult to understand the question but i guess you are trying to ask whether it is okay to enclose <p> tags within <header> tags or any other element for that matter. The <header> element represents a container for introductory content or a set of navigational links and can contain one or more heading elements <h1> - <h6>, logo or icon and authorship information according to W3C. You can read more here: https://www.w3schools.com/tags/tag_header.asp