We’ve had this discussion among our group, and we can’t seem to find any information on it.
Do dungeons scale in difficulty based on number of members in the party? If so, does it only scale upon “creation”, or is it a dynamic thing?
Personally, I feel like there isn’t any scaling, and its just confirmation bias after getting to know the dungeons and / or leveling up to make the content easier. But it’d be nice to get some sort of official confirmation, as there’s nothing in the game that tells you about it.