Hi there!
Thanks for your query. There is no default way to do that. It requires copying add-on FILES and related CSS & JS code.
In theory, coping add-on from template A to template B is possible.
Location: templates\shaper_TemplateName\sppagebuilder\addons
But you have to remember that in some cases, addons have unique CSS and js which was included inside the template.css and template.js file of the template.
So you have to Copy those as well.
The following video tutorial may help you:
https://www.youtube.com/watch?v=WXFd4RJVofA
Note: We discourage to use one template's addon to another since it'll be all erased after a new update. So, you need to change that manually after each update. Also custom support is beyond our support range.
Best Regards