You might occasionally see the watts briefly drop. If someone is doing sticky watts really well then you won’t see a drop but sometimes they will mess up and you might see it go 6w/kg down to 1w/kg before going back up again.
Here’s an example of someone using some sticky watts. You can see that they sprint up to 600w a few times then stop pedaling and Zwift holds the 600w for 3 seconds.
This isn’t a great example of sticky watts but it does show the basic principles in action. Ideally you want to pedal for 1 second, stop for 2, then repeat. Done well and with intent other riders won’t see any change to your power. It would only be detectable after the event as Gordon who posted above shows.