Howdy @ComicDee and welcome to the community 
While style changes cascade down from the base breakpoint to mobile, any changes to the position of these elements on the page itself affect all breakpoints.
To shift elements around on a specific breakpoint, you’ll need to use styles to achieve it. Flexbox and Grid both have the ability to change the order of content visually without actually moving their position in the Navigator panel so I’d start there.
If you reply with your read-only link and a bit more information on what you’re trying to achieve I’d be happy to take a peek and give you a bit more information 