Fighting with content width & margins

Using the Twenty Twenty Four theme with absolutely zero plugins, I’m fighting against getting margins and content width to act the same on all pages.

Homepage (Blog home) it seems to work fine with a column/column nest.

But on another page, I can’t seem to get column/column nests to act right. They seem to have some default margin applied, that I just can’t get consistent.

Opening developer tools here’s what shows for the area

And here’s how the editor looks for the page

Appreciate any feedback, im clearly missing something.

The page I need help with: [log in to see the link]