Yes, that may be true but the tiny world was also unable to hold anyone at the heavenly fate realm or higher so the experts highest possible stage was legend rank with having a mastery of any law. If any one reached a higher realm then they tiny world would reject them to the point of erasing their existence.

It's season 3 now

The name of the island is Jeju and there is no shot they are going all the way to Jeju Island within only 12 episodes

I'm going to bet that this is where season 1 of Solo Leveling will be ending at