Are there any prerequisites for cloning switch settings between devices?

Zyxel_Kay

Yes, both switches should be registered to a site your Nebula org., and it's essential that the source and target switches are of the same model.

For more detailed guidance, please refer:

https://community.zyxel.com/en/discussion/18833/how-to-clone-the-nebula-switch-settings-from-old-to-new-device