hide sidebar

It depends on your theme and has nothing to do with Pods.

A sidebar can be hidden by modifying your theme with PHP or CSS.

Trying Google the name of your theme and “remove sidebar” or “hide sidebar”. Or see https://www.hostinger.com/tutorials/remove-sidebar-wordpress for one example.

And if you mean a button that optionally hides the sidebar, try jQuery .hide(): https://api.jquery.com/hide/