In Application Composer Custom Objects Security, What is the Privilege required for a Role to appear

Summary:

In Application Composer > Custom Objects > ERP and SCM Cloud > XXCustom Page > Security, What is the Privilege required for a Role to appear in the list?

Content (please ensure you mask any confidential information):

There are few roles appearing under the Security. We want to provide CRED operation to another Custom Role. But it is not appearing under this. How to get the other Custom role here? What is the privilege required?

Version (include the version you are using, if applicable):

24D

Code Snippet (add any code snippets that support your topic, if applicable):