How To Remove Scroll on Right Side of Page for Mobile View

How can I remove the scroll on a page for mobile view, as it shows in Chrome etc, and makes the page seem wonky with a long gray bar down the right side. We have tried a few things but not working so far.
Would love some help, or CSS that is easy to just pop onto this page, or if there is a better solution, we are all ears.

I saw a suggestion online for an update to the Function PHP file, but would need 1) Confirmation this works 2) clear instructions because I just know enough to be dangerous. :slight_smile:

Thank you in advance.