Per SEO recommendations H1 tags should be present on pages.

[AutomationD]

Per SEO recommendations (semrush) H1 tags should be present on pages.

About this issue

While less important than <title> tags, h1 headings still help define your page’s topic for search engines and users. If an <h1> tag is empty or missing, search engines may place your page lower than they would otherwise. Besides, a lack of an <h1> tag breaks your page’s heading hierarchy, which is not SEO friendly.
How to fix it

Provide a concise, relevant h1 heading for each of your page.
Category:Meta tags, Indexability

[vercel]

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[HEIGE-PCloud]

While using multiple <h1> elements on one page is allowed by the HTML standard (as long as they are not nested), this is not considered a best practice. A page should generally have a single <h1> element that describes the content of the page (similar to the document's <title> element). Prefer using only one <h1> per page and nest headings without skipping levels.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Heading_Elements#avoid_using_multiple_h1_elements_on_one_page