Need more info. or a case scenario.
If you’re referring to editing a template page for a cms collection, when you make an edit on this page, that change will take place on all item pages. If you unlink an element on the template page, this will unlink on all versions of the page.
If you’re referring to a collection list, it will act in a similar way to the template page because the list is essentially a repeat (template) of the styling. If something unique needs to happen within a collection list’s content, this will need to be factored into your database. OR you can break the list into (for example) two lists and allow an area between the content for your unique element. Hope that makes sense!