When falling and taking damage on wool, you produce vibrations which are detected by sculk sensors. In 1.19 this didn't seem to be the case.
Steps to reproduce
Load world in 1.19.2
Place wool down
Place sensor near the wool. Make sure they aren't on the same height so the sensor isn't occluded by the wool
Switch to survival mode and fall 4+ blocks on the wool
Notice you don't set off the sensor
Load the world up in 1.20.1
Fall on the same spot
Notice you do set of the sensor
Cannot reproduce in 1.21.4 or 1.21.5. Please confirm you don’t have a mod or datapack enabled that might be affecting the behavior.