Chosen Solution
All the holes on the Apple Watch ultra are seated with a mesh spanned across the holes and looks to be seated with a tight span. The mesh in the hole above the crown looks wrinkled. Can someone confirm this is normal and not a defect? Or is this some sort of a bellow?
Looks like that hole is leading to a barometric sensor. It also has a route to the band slot.
Could be the valve toa evacuate water after you’ve been swimming. Should be a setting on the watch for it.