It was already solved a couple of times but all the solutions are not working anymore. Maybe a new update?
On desktop, the homepage looks great, but on mobile, there is a giant white space next to the website. Please see the screenshot,
Regards your concern about white space appearing on mobile.
That is because of some element on your page is overflow from their parent width and it caused the huge gap white space. But there is a solution for this you can follow all these steps to fix the issue
Step 1: Online Store > Themes > Action > Edit code
Step 2: Go to theme.liquid > scroll to the very bottom and paste this code :