Please help me find a problem when searching for a domain

domain com
When I search like this, I have to get the main page, but I only get blog posts. May I know what the problem is?

did you added your website to google search console
https://search.google.com/search-console/welcome
also what content of your robot.txt file at your home directory

most likely that your blog pages are getting more authority than the homepage itself,
this can be due to many factors like in/off links, content, etc...

if you're trying to rank for the brand name, you might want some links with brand anchors,
or/and optimize the homepage with better content & include the brand name several times as well