As there seems to be the ability to add interactibilities on objects, I attempted to add NPC interactibilities to add custom dialogue on different objects to act as a narrator, however this seems to be not natively supported or seems to not work entirely, can't find anything about this on the documentation either.
There is the InteractableObjectQuest but no support for dialogue on interactable objects (yet). It was on my mind during the NPC RPC rewrite earlier this year so it will likely be added at some point.
As there seems to be the ability to add interactibilities on objects, I attempted to add NPC interactibilities to add custom dialogue on different objects to act as a narrator, however this seems to be not natively supported or seems to not work entirely, can't find anything about this on the documentation either.