When I search my website in Google, all my pages are listed randomly. How can the main pages be grouped under the main page link, like other websites?

When I search for my website name, it lists all the pages but not grouped under the main site. For example, when one searches up Sony in Google, it shows the main Sony main page link with four main pages underneath.

Is this simply about ranking, SEO or do I need to look at another setting in my WordPress.

Sorry, I’m not sure what this is called so that title probably doesn’t make a hell of a lot of sense. I just wanted someone to explain the wording here so I can research it up.

Cheers