The bug
Many events related to mob/entity spawning don't emit a vibration level of 14:
Allays replicating
Animals breeding
Baby chickens spawning from thrown eggs (MC-261703)
Baby sniffers hatching from sniffer eggs
Baby turtles hatching from turtle eggs
Ender dragons respawning
Endermites from ender pearls (not teleportation)
Evoker-summoned fangs (MC-209908)
Evoker-summoned vexes (MC-210485)
Golems/withers coming to life after being built
Magma cubes spawned from dead larger magma cubes
Mobs spawning naturally
Raid waves spawning
Silverfish emerging from infested blocks
Slimes spawned from dead larger slimes
Expected result
All these events would produce a mob spawning game event, as all of them are mobs spawning.
Please keep this as a single ticket.