I reach the Sunken City to find some Coral Golems to get the Crystalized Coral Fragments, but to my surprises, there is none of them spawning in Sunken City, I thought maybe I miss some rooms, but after using Spectator mode to search the whole place, there is still no signs of any Coral Golem, only Coralssus and Deeplings. I did try to check another Sunken City, but same thing happened, no Coral Golem at all. In game creative inventory still has its spawn egg and the crystalized coral fragments and relevant recipes, but no signs of Coral Golem spawning in Sunken City.

I am using NeoForge 1.21.1, as the title said, and the latest version of Ender Cataclysm.