Same issue. I restored to iOS14 and it was then in Health App, but since my backup was in 14.2, I needed to restore to 14.2 and the Blood Oxygen is missing there. Can't download on watch either. Guess need to wait for next beta.
CSM
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
From
Sterling, MA, United States
Post
Replies
Boosts
Views
Activity
I had same problem. Fixed in Beta 5.