So i just tried to find the sculk sensor in the creative menu and i couldnt fint it by searching, i went throught all the categories and still didnt find it, i ended up using the /give command to get it
MC-226451
Sculk Sensor not found in the creative menu
Resolved
Works As Intended
0
This is intentional as stated in the 21w19a patch notes. Quote - "Unfinished items (Sculk Sensor, Bundle and Candles) have been removed from the creative inventory".