Make Strips Gallery appear as 2 columns on mobile

Site URL: https://marlin-plantain-z2gr.squarespace.com/

Hi - I have a page with lots of Strip image galleries, which I would like to display as 2 columns on mobile. I have used a code that does this, however when viewed on a mobile there are lots of awkward gaps between images where they are different dimensions. Is it possible to fix this, or to set the galleries so that they display as strips on desktop and as two column Masonry gallery on mobile?

This is the page:

https://marlin-plantain-z2gr.squarespace.com/portfolio/work

pw: 123

Some screenshots of how the gaps appear on mobile:

In the code you used to make 2 items/row on mobile, edit this code

.gallery-strips-wrapper.gallery-strips-list--ready {
        height:auto !important;
        display: grid;
        grid-template-columns: repeat(2,1fr);
        grid-gap: 10px 10px
    }

to this

 .gallery-strips-wrapper.gallery-strips-list--ready {
       columns: 2;
        column-gap: 0;
        height: auto!important;
        display: block!important;
        padding: 0;
    }