What made you to conclude that this is Ai? From what I can see there is clear use of 3D assets for monsters and backgrounds. But Im failing to see any of the common tells of Ai generation so im curious to know what I may have missed that led u to believe it was Ai.
On the panel where it introduces Tenma with the nameplate and his F rank, look at his hand, especially the fingers, and the vein, and a few panels down where the shot is focused on a monster jumping over Tenma and the kid, look at the face of it, especially the eyes and nostrils, as well as the slashing hand with the claws
Showed those panels in a couple manhwa discord groups, and the overwhelming consensus was AI was used
Just a heads up to anyone wanting to read this, it does use AI for the "art", which is pretty obvious from the very first pages on chapter one.