Is there a way to hide the Resource Id from users. We have configured it on a secure page that only admins can see.
When we do it for other attributes it does not show values on the list page even when configured.

But resource ID can be seen once configured.

Why is this attribute different?

The reason that certain  attributes are showing up on the list page is because they are on other non-secured sub-pages of the resource object as well.

Because the Resource ID is required, it has to show on another page, such as the Create Page.

Project Manager is another field which cannot be hidden.

Release : All

This is by design. There are certain OOTB fields which cannot be hidden, even when using secured sub pages