Changing the page width of posts with Wordsmith

Hello,

I am using the wordsmith template that comes with the premium version of GP and I am having some trouble changing the width of the blog posts that I create.

I can change the container size on all of the other pages, but when I post a blog page the content is very narrow and I can't seem to adjust it. I can turn the sidebar off to make the content wider, but this is still not as wide as the other pages and it looks very strange on a desktop.

Here is one example - https://joelstraveltips.com/the-20-best-traditional-korean-dishes/

I've tried adding a layout element to change posts,but this still does not go any wider (even when I select full width).

Can anyone advise me how to change this?

Thanks, Joel