The Bug:

Sculk sensors are not activated upon interacting with an unemployed villager

Steps to Reproduce:

• Summon an unemployed villager and interact with it. (Right-Click by Default).
  →  Notice how the sculk sensor does not activate upon doing this.

Additional Information:

Quote from the 20w49a Changelog, "A vibration is anything that causes physical motion". I would definitely consider this as physical motion, as you are physically interacting with the villager. The villager also shakes its head whilst doing this, which is definitely physical movement.