some mobs appear very rarely

some mobs appear very little, I spent several hours looking in a lush cave and no axolotls appeared, I tried in several difficulties and in several different worlds, and in creative, but they do not appear, this also affects the goats in the mountains (although to a lesser extent) and the endermans in the deformed forests, which makes it very difficult to reach the end.

I think this also affects version 1.18.12 because there is nothing related to it in the release notes.