what happened to the water lock on apple watch ultra on version 10

To open the Control Center, press the side button. Tap the Water Lock button.

Press and hold the digital crown to exit the water lock & to expel water.

M1 Mac mini, macOS 13.5.2;  Watch, series 7 GPS/cellular, watchOS 10; iPad Pro 2nd Gen, iPadOS 17; iPhone 12 Pro, iOS 17; TV 4th Gen, tvOS 17; HomePods, audioOS 17 and Airport Express w/ Airplay 2