Surpassing the 2500 pixel resolution limit

Dear community,
I'd like to ask for help here, to know if it's possible to surpass in any way the limit of 2500 pixels to be displayed in a Squarespace site.
I've been searching for some time and didn't find anything related.
I'd be interested in applying that to the Gallery seen in the home page -not on the rest of the site-, as the images look grainy when seen on full screen.

Thanks of much for your help or recommendations.