Would it make sense to try to find evidence for any potential survival of norse dwarfs by examining their version/section of the Waystone network? The idea being that dwarfs are an essential component in the function of the Karak Waystone, so the functioning of that waystone can be an indicator of drwafs hidden deep within the Karak.
I assume they needed Karak Waystones and runic protection from storms of chaos and this sort of power would be just the thing to live underground cut off from the surface, though I can't explain why they wouldn't be part of the wider network or why this wouldn't have been checked as part of (presumably thorough) investigation by the Karaz Ankor previously. They could also just have dug deeper/to other mountains/power their civilisation via geothormal power or other crazy stuff and this doesn't account for that either.
I assume they needed Karak Waystones and runic protection from storms of chaos and this sort of power would be just the thing to live underground cut off from the surface, though I can't explain why they wouldn't be part of the wider network or why this wouldn't have been checked as part of (presumably thorough) investigation by the Karaz Ankor previously. They could also just have dug deeper/to other mountains/power their civilisation via geothormal power or other crazy stuff and this doesn't account for that either.