Please post the YAML code of that dashboard (I’d prefer the layout-card variant). Then we’ll see how we get there. 
In a nutshell: layout-card is able to set “media queries” for different device widths, so you could easily order the shown cards specifically for mobile or desktop view. And you can set the width for the grid-columns in pixel as well as in percent.
Please post the code formatted, see here #11. It’s important, because in YAML indentation matters very much, and without a proper formatting, these (possibly wrong) indentations get lost. Thanks!