You mean here?
If yes your actual screen needs to be wide enough to show 1920 plus the editor controls so if its not the editor zooms in else you wont see the full page design.
If your question is something else then let me know.
You have a lot of elements set to relative and I do not see why.
I would change section 2 to be a relative so div block can relate to it.
That might fix your current problem.
I do not see the changes in the editor, you may need to share it again.
I can publish changes so its hard for me to resolve.
My suggestion is to remove changes you made 1 at a time until you find one that has caused it.
Duplicate the page and work on that duplicate so you do not break anything.
Sorry can’t be of more help, if it was showing in the designer I could.