I have noticed that, in the current beta 1.17.30.24 axolotls do not spawn. I have explored a lot of the world and seen no axolotls. I have also set up a spawning box per the requirements for axolotls to spawn: 1) Below X 63; 2) Water sources only, no flowing water; 3) Solid blocks above and below water; 4) Complete darkness; 5) Tinted blocks on all side so that I could see spawning. I afk'd 30 blocks away (sim distance of 4) for an hour. NO axolotls spawned.
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Duplicate MCPE-140859.
There is no need to create new reports if a report for your problem exists (even more so if you found a report). Also in MCPE-140859, additional information was requested. You can also add the required information in the comments for MCPE-140859. You do not need to create a new report.