How to create Custom Plugin and use in Registration Form without override?

I have created a Seat Chart Plugin, so the User can select some seats where he wants to sit. I had to override some models and views, but I want to detach these overrides from the Component, that i can update the Component without any concern.
Is this possible at the moment? And if yes, which Function does the Plugin need? As far as i know, in the documentation is only an eventhandler for the Details Page.

Hi

Unfortunately, we don't support these kind of plugins at the moment. So you will still need to use override for these customization

Regards,

Tuan