How to Exclude Page from Navigation Menu?

Have a look at the plugin called “WP Hide Post” (https://www.ads-software.com/extend/plugins/wp-hide-post/).

If your theme allows for CUSTOM MENU, you can create a CUSTOM MENU and add only the pages you want to be available to everyone there. That way you can remove (or not add) whichever page you want to exclude.

With most CUSTOM MENUes, whenever you add a new page, it will automatically show on the navigation bar/menu.. just remember to remove it if you don’t want it to appear.