Blank Blog

That is because it is most likely a template that will only display posts for a specific category such as “blog”.

Is it fixable at all?

It looks like all of your posts are being published under the “News” heading. You could just remove “Blog” from the menu by navigating to appearance > menus in your admin panel.

That’s the problem though – ‘blog’ doesn’t show up on the menu. I cannot find it anywhere, so have no means of customising it.

If it is not in the menu editor, then try looking for blog settings inside your theme settings page. There might be an option to disable the blog. The theme you are using is called “Suffusion” and is no longer in development or supported by the author and has been pulled from the repository here on wordpress dot org.

https://aquoid.com/2017/02/legacy-suffusion-version-availability/
https://aquoid.com/themes/suffusion/menus-native-enhanced-and-mega/

Didn’t realise the theme had been pulled, looks like there are fundamental problems that need addressing. Thanks for drawing that to my attention.

Yes, I wanted to make you aware of that. Even if a theme is not actively developed, having it pulled usually suggests there are issues that need to be addressed.