Be aware that what you want to implement is the observer design pattern, having your domain model object as the subject and the views as observers. Note also that this is a higher level abstraction construct than a mere smart pointer, and there is no conceptual correspondence between them.

In order to implement it, all views should implement a common interface (for example, by inheritance), while the domain object would manage a set of references (for example, smart pointers) to instances of that interface, notifying them all (by calling the appropriate interface methods) when required.

Be aware that you're accurately describing the observer design pattern, given the domain model object to be the subject and the views to be observers. Note also that the observer pattern implies a higher level of abstraction than a smart pointer, and that there is no direct conceptual correspondence between the two of them.

In order to implement this pattern, you must firstly ensure that all the involved views (observers) implement a common interface, for example by inheriting a common base, abstract class. Then, the domain object (subject) can proceed with managing a set of references to instances of that said observer interface, and notifying them all when required, by calling the appropriate interface methods.

Smart pointers can be used in this scheme to implement the references managed by the subject.