Hi @Rowan774,
You can try this code by following these steps:
Step 1: Go to Online Store->Theme->Edit code.
Step 2: Search file theme.scss or theme.scss.liquid
Step 3: Paste the below code at bottom of the file → Save
@media(min-width:1024px){.wrapper{max-width:100% !important}}
Hope my solution works perfectly for you!
Best regards,
Victor | PageFly