The only nodes that are possible to be used to subscribe to events in a generic way is the ‘Code Event’ and ‘Code Event(T)’ nodes.
Both of these nodes though, work only if the events are created in a very specific way and not everyone use this way for declaring event for sure.
Events are very strict in how they work in c# and that is the reason why it is practically impossible to support all type of events that can exist in different assets.
Is there any documentation about the assets you are referring to? If so let me know.
Thanks.