Hi there,
I have two axolotls, one cyan and one green. When breeding them, I am only getting the two variants that I am breeding with (so I’m only getting cyan and green babies) and I have tried many times. I have seen the black one in lush caves, so I am able to find other variants, just not breed any other colors from the two I have. I do have the latest version installed.

I found another color variant and I’m still having the same issue. Even with breeding two of the same color, only getting that variant.

that's how it works, you have to find all the ones but glowxolotl, skulk and blue.

Then you have to breed them until you get the non natural ones, you'll get one of the parents' variant but a chance to get a non natural axolotl variants.