I’ve checked my page, column, and section settings, ad nothing seems to be able to make sections on the top of a testing page full width. The rest of the page is full width, but any sections I add to the top are not full width.
I hope you are well today and thank you for your question.
Could you please also share the page URL from your site where it is displaying and tell me exactly which section you want to make full width so that I can help you to achieve it?