The same goes for bold text, span and div tags, etc. It’s all about whether the algorithm (e.g., BERT) says it’s relevant to the query. HTML structure can actually make or break your SEO ...

Google got wise to all the keyword stuffing, overuse, and sites trying to disguise heading tag HTML with CSS ... their utility in giving your content structure. In a world ruled by algorithms ...

You don't have to use any H1 tags, or you can use many, either way, it is not a critical issue specifically for Google search. He did say it helps Google understand the structure of the page ...