Hey Isaac, hopefully I understand your question - you can definitely edit your site's code (html/liquid) and re-structure h1 , h2 etc as you see fit here is where to do it in your store settings : https://help.shopify.com/themes/customization#view-the-edit-code-page
Just be sure to watch the CSS rules, if you change an h2 to an h1 for example there may be a significant amount of styling associated with it that will just disappear.
Hope that helps,
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