Tested in Bedrock[]
The example farm described in this tutorial works in Bedrock. In my hard-difficulty survival game, I even built it on a small island in the middle of a deep ocean near a monument, and while it hardly had any yield due to so many spawning locations available outside the farm, it still spawned a couple of glow squid and an axolotl as I periodically checked it over several in-game days. Built far away from an ocean, it should have a pretty good yield.
The rules for axolotl spawning are actually more restrictive in Bedrock, so this should work in Java edition too.
Now, if anyone can come up with an automatic blue axolotl breeder, that would be something! Amatulic (talk) 05:21, 28 September 2021 (UTC)