Subcomponents for Jira is a collection of several independent project component and version extensions:
Using Project navigation menu setting you can choose between two
Project navigation menu
Enable extension per project
Each extension can be enabled or disabled individually on a project basis.
You can select projects which a particular extension will be enabled or disabled for.
When the extension is disabled for selected projects it is enabled for all other projects in Jira.
Extension links visibility in project
You can control show or not the extension link in Project navigation and Project settings.
By default, all extension links are displayed in both places.
These settings are global and are applied to the extension link in all Jira projects.