Hello @simonselmer,
Actually you need to understand what exactly the static home page and blog page is and also how this work on our theme.
A static front page which is used to show customized content ie each theme has a front page where there are multiple sections like testimonial etc as shown in the demo of the theme.:
https://themepalacedemo.com/blog-diary-pro/
By default, WordPress uses the first option by showing your most recent posts on the front page. Some users prefer the second option which is also known as a “custom home page”.
This feature is particularly useful for websites that want to keep a blog separate from other sections of their website or for users who want to showcase content other than blog posts on the front page of their website.
Before you can set a static front page for you site, you have to create and publish the page that you would like to use as the static front page.
So whatever page you chose to display the front page, the sections already built in the theme will be displayed here. Also, different theme will have different functions and design and our theme work in way that we have mentioned above.
Hope this clears the confusion.
Thank you.