The Bug:

Sculk sensors are not activated upon maps being drawn.

Steps to Reproduce:

• Give yourself a map and draw on it. (Right-Click by Default).

/give @p map

→  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 performing this task.