Cannot access to _metadata property in Html and VuetifyTemplate components

[dfguerrerom]

I am working on a new voila template by adapting https://github.com/voila-dashboards/voila-vuetify...
In one of the apps that we have created, we use v.VuetifyTemplate to include dynamic javascript code in the DOM, however, with the voila template, anything that is not passed as direct child of the target component (the one that has the mount_id), won't be created in the DOM.

I tried to use some of the v.VuetifyTemplate properties to specifically create its view but I couldn't find anyone with similar capabilities of the _metadata property from VuetifyWidget class, is there a way to give those components an unique id?