the scrubby zoom doesn't work in liquify mode

The current MacBook M1 promontory 
iPad 4th Generation Pro
Apple Pencil 2nd Generation 

MacBook is being used as the main monitor, and iPad is being used as a tablet in conjunction with MacBook through mirroring
On the regular editing screen, camera low, etc., select zoom and drag the pencil from side to side
Scrubby zoom is activated

It does not operate specifically in liquid pie mode.
I can zoom in with my fingers, but the reaction is too slow, so I want to use a pencil
Is it not implemented yet? Or do we need another setting?

All versions are up to date.