Yup. I think its also underrated tournament elsewhere than NA, cuz first of all its not a tournament arranged by IIHF, thus its not broadcasted anywhere else.
Secondly, its still played on summer and most of the NTs havent really played games before it this ssn, so f.ex Finland has only one camp game vs Finland U19 age group under their belt, no matter how many times before these players have played together with this age group before. So some rust might always be included and thats why it doesnt make interest for every fan, cuz they know players will develop playing as much as possible and this is one hectic scheduled tournament which can display a lot of great skill but also fatigue when its final day.
Third. This is vital for the draft eligible guys yes and Canada has shown its dominance earlier and can get their best possible roster (when everyone is healthy), but most often not every other team come even close to them when they also play their younger players that has a lot of potential for the future. Small sample sizes doesnt interest many - however it gives an early glimpse of those that has edges early on comparing to others in this age group.
This is U18 World Cup and heck of competitive high lvl tournament and scouts rly focus on this like 110% already. But underrated cuz of those and maybe some other reasons elsewhere than Canada.