Blood oxygen app not working on Apple Watch

I called support. They elevated this to have their engineers look at it. More than a few people are having the same problem. When I first set up my watch, the Blood Oxygen app and altimeter complication were there. The altimeter worked but the Blood Oxygen app didn't. I restarted the watch and they both disappeared. I can't find the Blood Oxygen app on the watch store on my watch. Using the watch app on my iPhone to look in the app store, it shows up but says it can only be loaded from the watch. Tried sending a link to the app from my phone to my watch using messages. The app appeared on my watch when I clicked the link. GET was grayed out and above it said, "You must have an iPhone." Another thing I noticed is that in watch settings, scrolling works once. When you enter a setting category, it stops working. I am also unable to get my mac to use my watch to unlock apps. It keeps telling me it can't find my watch.