How do I hide a section on phones but keep it on desktop?

Open the page in the builder: Content → All Pages, click the pencil (Edit) icon on the page, then Open Builder →.

1. Click the section to open its settings.
2. In the row of device tabs at the top of the panel, click Mobile.
3. Tick Hide on mobile.
4. Click Save.

Do the same with the Tablet tab and Hide on tablet if needed. Wcart treats screens narrower than 768px as mobile, 768px to 1023px as tablet and anything wider as desktop.

The section stays in your list and keeps its settings, so you can untick the box any time. To check, switch the preview to Mobile with the device buttons in the top bar.