Sculk sensors are not activated upon shearing sheep, mushrooms, snow golems and pumpkins.
Steps to Reproduce:
- Shear a sheep.
- Shear a red or brown mooshroom.
- Shear a snow golem.
- Shear a pumpkin.
→ Notice how the sculk sensor does not activate upon doing any of these things.
Quote from the 20w49a Changelog, "A vibration is anything that causes physical motion". I would definitely consider these as physical motions, as you are physically performing all of these this tasks.