I wrote about the Backlinko results in November 2019 on LinkedIn, tagging Brian as well. But it looks like Brian already put some effort into the pagespeed of his website. As a result, he is now passing Core Web Vitals.
Some (WP) agencies are really into accessibility. However, when you do support accessibility as a developer, but not really pay close attention, there is a big chance you are unknowingly building inaccessible Wordpress websites for your clients.