Services items, Menu problem – Can’t see and add them at all in Edit Menus Tab.

Hello,

I can’t add any “Services” type of posts to the menu. They seem to be invisible in “Edit Menus” Tab at all.

How do I add Services items to the Service menu as a “Services” type of posts (pages)?

Is something wrong with my code or was it never possible to create a Service Menu simply by adding Services items?

All I see in “Edit Menu” Tab at wp-admin/nav-menus.php is:
Pages (ability to add standard Pages)
Logos (after installing Logo Showcase plugin)
Links
Categories (which seem to be related to Portfolio items)
Categories (this one only says “No items.”)

That’s it.

Please help.

Thank you