In the strategic roadmap, you can see the release names of selected workspace, but you can not see the release names from others workspaces, despite of being posible to display the initiatives from other workspaces.
The Strategic roadmap displays releases linked to records visible on the roadmap, regardless of which workspace the releases are in. If the initiative is expanded to show its child records, then the Release names section will display all releases linked to that initiative and its child records. If you collapse the initiative, the Release names section will just display the release linked to the initiative.
Please reach out to our Customer Success team at email@example.com if you have any additional questions.