How do I save changes per page and not globally

I was trying to quickly duplicate the existing “theme look” with a new upfront theme so I can cancel the pagelines subscription. I started by cloning the theme/content with cloner to … then I applied the fixer theme. the site only has a few pages with separate content and images… but when ever I make a change to any of the pages .. those changes are saved globally … its not letting me customize individual pages …. adding a youtube video to the home page adds the video to all the pages

current stack is wp ubuntu on digital ocean with cloudflare temporarily disabled