How correct do upsells look in a product card with h2 headings?

Question

Search Engine Optimization

A store on woocommerce either prescribes H2 upsell headers from the very beginning, or the theme does it. It turns out in each card from 10 to 20 H2 headings, with a minimum of text. Do I understand correctly that I will either not get the necessary relevance at all, or it will be smeared very conditionally.
I look at the output in the console and see that the brand is relevant, but the displayed product does not match the request.
To what "H" to downgrade the titles of the upsells? Is h3 enough or is h6-h5 better? Or no "h" at all?

Answer 1

Look at the competitors. According to the experience in e-commerce on the product card, there are usually about 3 subheadings h2, h3 are used infrequently, but if they are used, about the same amount. And h4-h6 is used very rarely.