I would not take an Apple Watch diving, they are only really rated for swimming. If you do want to take it diving Catalystcase.com has a case that is rated to 100 meters or 330 feet. Waterproof Case for Apple Watch Series 6, 5, 4 & SE
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The whole face is touch sensitive so it might be even more than just moisture, but also pressure. Hence the drysuit watch failure.
From the apple website:
Apple Watch Series 6, Apple Watch SE, and Apple Watch Series 3 have a water resistance rating of 50 meters under ISO standard 22810:2010. This means that they may be used for shallow-water activities like swimming in a pool or ocean. However, they should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth
What's the benefit of 50m water resistance if you should only use it for "shallow-water" activities?
Reminds me of the Clinique Moisture Surge. Who wears face lotion for 100 hours without washing their faces - what benefit does this offer?
NEW Moisture Surge™ 100H Auto-Replenishing Hydrator
An upgrade on our fan-favorite. Refreshing oil-free gel-cream penetrates deep, lasts 100 hours.