When I visit any Jevelin website (and mine) at a … x 800px resolution, it creates enormous big gaps between the columns. This only occurs at exactly 800px width, everything is fine at 799px or 801px.
Unfortunately a lot of Tablets use 800px width as Portrait width, what makes this view almost impossible to watch.
Could you please share me the page URL from your site where it is not displaying correctly and also share the screenshot of the issue so that i can troubleshoot it?
I made three screenshots of the Home Basic theme (https://jevelin.shufflehound.com/), where the big gaps occur at 800px width when looking at the Icon Boxes.