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Adjusting breakpoints

Hi guys,

I hope everyone is well.
I have made a mistake and I design a webiste at the larger breakpoint 1920px. from what I have seen on thee forum the changes cascade down from the desktop version to mobile and then up to 1920. Is there any way by any chance that my whole design on 1920px can be replicated downwards to the other sizes?

Many thanks,
Stelios