Non-structure mobs such as zombified piglin can spawning in bastion remnants.

But mobs can't spawning in trial chambers and ocean monuments.

Steps to reproduce

1. Typing a seed: 3619432361855898474
2. Running command /execute in minecraft:the_nether run tp @s -166.30 63.00 454.42 -274.82 19.50
3. Switching your gamemode to creative.
4. Observing around.

×The zombified piglins spawned in bastion remnants.