Few good links -https://www.axamit.com/blog/adobe/customizingtouchuidialogshttps://experienceleague.adobe.com/docs/experience-manager-gems-events/gems/gems2015/aem-customizing-dialog-fields-in-touch-ui.html?lang=enhttps://github.com/Adobe-Marketing-Cloud/aem-authoring-dialog-fields-customizationhttp...

Please see if this help your usecase , https://sourcedcode.com/blog/aem/dynamically-include-an-experience-fragment-in-sightly 

What is the problem statement you are trying to solve with this? If you can give a summary probably it will be easy to figure out the right way and if at all you need to go this route or not. ThanksAnika

Anyone has any view on how to achieve interactive graphics. We were trying design importer but its deprecated now on cloud. ThanksAnika

Please find similar query posted @ https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/pass-value-from-js-to-sly-attribute/td-p/375719 Please see if this helps. ThanksAnika