Great question! We can't do this yet, but this would be a very useful feature to have and save lots of time in 're-inventing the wheel'. I will suggest a hack in a moment, but if you want to see this functionality brought in you can suggest it in the roadmap portal here: Under consideration - Zephyr Scale | Product Roadmap (productboard.com).
Hack: most if not all gadgets are available as reports. Unlike gadgets, you can see the logic of reports in the report's URL. That means you can easily change the source of a report from one test plan/cycle to another. And you could use Excel or another tool to make that alteration easier in bulk. The challenge with this hack is how to display your reports. You might be able to workaround this issue with a browser tool - Edge Workspaces might be an option for example.
Good luck!
