You can set the Content Width and Disable the Sidebar in one place. Then set the Display Rules for the Posts you want to apply it to. I would give the posts a Category or Tag that you want it to apply to so you can automate where it is applied to.
Hey Leo,
The page is not published, it is in the draft.
The problem is I want the page to be full width, but when I select from the layout “Content (No sidebars)”, this is what I am getting: https://prnt.sc/p2c77l