Is there a HTML technique for organizing my site's main pages in Google (navigation)?Or is it made by a Google's specific tool for creating a result layout like in this picture?Look at the difference of the results for my site:
how do we organize our site's (navigation) pages in Google search?
seo;google search console;google search;http headers;navigation
What you're talking about are Sitelinks. They're automated by Google so you can't really control them. You can, however, demote Sitelinks you don't link if they do start appearing.