Site title vs SEO Title

Hi, How should this work?

We’ve a website title set up in General “Dave’s palace” for example. We’ve got the front page set with an SEO title “Welcome to the Palace of Dave”.

When you search for the page in Google, we are seeing “Welcome to the Palace of Dave”, but it’s under the URL as the sitename, instead of “Dave’s Palace”.

When you look at our competitors, they have the Site Title represented properly, so the name of the site, rather than the URL.

Is there anyway to influence Google to pick up the website name properly? It’s set properly in Yoast and in the WordPress settings, but Google just seems to ignore it.