Should I use H1/H2 or H3 for headings in category page?

[seo.gops]

In my category page such as


I list out several articles with their titles(in H3 tag) and their excerpts. Ahrefs reports that this page missing H1 tag.

So, what should be the best practice for such a category page, should I change all H3 tag to H1 tag, or just to H2 tag?