Associate to screens

For both custom field types, once you save the configuration, you will be offered to add it to a project.

There is a big difference here between Connect custom fields and Connected items:

• Custom fields are directly associated to Jira screens, handled by Jira global administrators
• Connected items are associated to issue/request types directly in projects, handled by Jira project administrators

On the top right of the screen, click on "Next steps: add to project"

You will be redirected to the global admin well-known page: Associate field to screens