Are state based Anim Notifies not propagated to Animation Sharing instances?

The documentation for Animation Sharing states that:

As for the native implementation, it exposes GetInstancedActors which returns all AActor(s) that are currently being driven by this state. That way , in case there are Notifies, they can be handled correctly and propagated to the unique instances.
This is achieved by overriding HandleNotify and handling it accordingly.

But HandleNotify is only called for stateless anim notify types (ones that don’t need a Begin/Tick/End) there seems to be no mechanism (or I am not seeing it) to propagate state based anim notifies to instances sharing animations. Am I missing something, or is this a planned feature that is still incoming?