swimming with apple watch series 6

According to How to use Water Lock and eject water from your Apple Watch it will not activate "when it gets wet."

Turn on Water Lock to avoid unintended taps on the display when you wear your Apple Watch in water. When you get out, press and hold the Digital Crown to clear water from your watch's speaker. Here's how.

When Water Lock is on, your Apple Watch doesn't respond to touch on its display. This prevents accidental input while you're in water. When you turn off Water Lock, your watch ejects any water that remains in its speaker.

Water Lock also turns on automatically when you begin a water-based workout, such as swimming or surfing. It also turns on automatically when you begin a scuba dive with your Apple Watch Ultra.

What Water Lock actually does is lock the screen so inadvertent touches to the screen are not registered. Turn on Water Lock before you get in the water.